0.2.50

app/build.gradle.kts

@@ -42,7 +42,7 @@ val projectNoticeText =
 
 // A release workflow can derive the app version from its Git tag without editing the
 // source tree. Local builds keep using the checked-in default.
-val defaultVersionName = "0.2.49"
+val defaultVersionName = "0.2.50"
 val membyVersionName: String =
     (project.findProperty("memby.versionName") as String?)
         ?.trim()

app/src/main/java/com/ponzischeme89/memby/data/EmbyRepository.kt

@@ -74,6 +74,9 @@ data class NextEpisode(
     val seriesName: String,
     val episodeCode: String?,
     val imageUrl: String?,
+    val logoUrl: String? = null,
+    val overview: String = "",
+    val runtimeMs: Long = 0L,
     val url: String,
     val resumePositionMs: Long = 0L,
     val subtitles: List<PlayableSubtitle> = emptyList(),
@@ -82,6 +85,10 @@ data class NextEpisode(
     val mediaSourceId: String = "",
     val playSessionId: String = "",
     val playMethod: String = "DirectPlay",
+    val subtitleDownloadAvailable: Boolean = false,
+    val trickplayAvailable: Boolean = false,
+    val skipIntroAvailable: Boolean = false,
+    val endCreditsAvailable: Boolean = false,
 )
 
 /** A resolved, directly playable stream. */
@@ -492,7 +499,9 @@ class EmbyRepository(private val settings: SettingsStore) {
     /** A shuffled set of movies & shows that actually have a backdrop image. */
     suspend fun getScreensaverItems(limit: Int = 200): List<BaseItem> {
         if (ServerConfig.isGateway) {
-            return requireGateway().screensaver(limit).items.filter { hasBackdrop(it) }
+            return requireGateway().screensaver(limit).items.filter {
+                it.id.isNotBlank() && hasBackdrop(it)
+            }
         }
         val userId = snapshot.userId ?: error("Not connected")
         val result = requireApi().getItems(
@@ -508,7 +517,7 @@ class EmbyRepository(private val settings: SettingsStore) {
                 "EnableUserData" to "true",
             ),
         )
-        return result.items.filter { hasBackdrop(it) }
+        return result.items.filter { it.id.isNotBlank() && hasBackdrop(it) }
     }
 
     /**
@@ -841,7 +850,12 @@ class EmbyRepository(private val settings: SettingsStore) {
      */
     suspend fun getCalendarMonth(month: String = ""): GatewayCalendar {
         if (!ServerConfig.isGateway) return GatewayCalendar()
-        return requireGateway().calendar(month.trim().takeIf { it.isNotEmpty() })
+        val calendar = requireGateway().calendar(month.trim().takeIf { it.isNotEmpty() })
+        return calendar.copy(
+            days = calendar.days.map { day ->
+                day.copy(items = day.items.filter { it.id.isNotBlank() }.distinctBy(BaseItem::id))
+            },
+        )
     }
 
     suspend fun lookupMediaRequests(term: String): List<com.ponzischeme89.memby.data.model.GatewayRequestCandidate> {
@@ -900,7 +914,11 @@ class EmbyRepository(private val settings: SettingsStore) {
     }
 
     suspend fun getMyShows(): List<com.ponzischeme89.memby.data.model.MyShow> =
-        if (ServerConfig.isGateway) requireGateway().myShows().shows else emptyList()
+        if (ServerConfig.isGateway) {
+            requireGateway().myShows().shows.filter { it.itemId.isNotBlank() }
+        } else {
+            emptyList()
+        }
 
     suspend fun saveMyShow(item: BaseItem): List<com.ponzischeme89.memby.data.model.MyShow> {
         if (!ServerConfig.isGateway || !item.isSeries) return getMyShows()
@@ -911,7 +929,7 @@ class EmbyRepository(private val settings: SettingsStore) {
                 year = item.productionYear,
                 imageTag = item.imageTags["Primary"].orEmpty(),
             ),
-        ).shows
+        ).shows.filter { it.itemId.isNotBlank() }
     }
 
     suspend fun removeMyShow(itemId: String) {
@@ -920,7 +938,9 @@ class EmbyRepository(private val settings: SettingsStore) {
 
     suspend fun getNotifications(): com.ponzischeme89.memby.data.model.NotificationsResponse =
         if (ServerConfig.isGateway) {
-            requireGateway().notifications()
+            requireGateway().notifications().let { response ->
+                response.copy(notifications = response.notifications.filter { it.id > 0 })
+            }
         } else {
             com.ponzischeme89.memby.data.model.NotificationsResponse()
         }
@@ -928,7 +948,9 @@ class EmbyRepository(private val settings: SettingsStore) {
     suspend fun setNotificationPreferences(
         value: com.ponzischeme89.memby.data.model.NotificationPreferences,
     ): com.ponzischeme89.memby.data.model.NotificationsResponse =
-        requireGateway().setNotificationPreferences(value)
+        requireGateway().setNotificationPreferences(value).let { response ->
+            response.copy(notifications = response.notifications.filter { it.id > 0 })
+        }
 
     suspend fun markNotificationRead(id: Long) {
         if (ServerConfig.isGateway) requireGateway().updateNotification(id, "read")
@@ -1281,7 +1303,7 @@ class EmbyRepository(private val settings: SettingsStore) {
                     "Limit" to "1000",
                 ),
             ).items
-        }).distinctBy(BaseItem::id)
+        }).filter { it.id.isNotBlank() }.distinctBy(BaseItem::id)
         seriesEpisodesMutex.withLock {
             seriesEpisodesCache[seriesId] = CachedSeriesEpisodes(
                 episodes = loaded,
@@ -2191,6 +2213,8 @@ class EmbyRepository(private val settings: SettingsStore) {
             response.item, response.url, response.resumePositionMs, resolveSubtitleUrls(response.subtitles),
             response.subtitlesEnabled, response.selectedSubtitleId,
             response.mediaSourceId, response.playSessionId, response.playMethod,
+            response.subtitleDownloadAvailable, response.trickplayAvailable,
+            response.skipIntroAvailable, response.endCreditsAvailable,
         )
     }
 
@@ -2218,6 +2242,7 @@ class EmbyRepository(private val settings: SettingsStore) {
             next, discovery.url ?: buildStreamUrl(next.id), next.resumePositionMs, discovery.subtitles,
             snapshot.subtitlesEnabled, selectedSubtitleId(discovery.subtitles),
             discovery.mediaSourceId, discovery.playSessionId, discovery.playMethod,
+            true, true, true, true,
         )
     }
 
@@ -2231,12 +2256,19 @@ class EmbyRepository(private val settings: SettingsStore) {
         mediaSourceId: String,
         playSessionId: String,
         playMethod: String,
+        subtitleDownloadAvailable: Boolean,
+        trickplayAvailable: Boolean,
+        skipIntroAvailable: Boolean,
+        endCreditsAvailable: Boolean,
     ) = NextEpisode(
         itemId = item.id,
         title = item.name,
         seriesName = item.seriesName.orEmpty(),
         episodeCode = item.episodeCode,
         imageUrl = primaryUrl(item, maxWidth = 400),
+        logoUrl = logoUrl(item),
+        overview = item.overview.orEmpty(),
+        runtimeMs = item.runTimeTicks?.div(10_000L) ?: 0L,
         url = url,
         resumePositionMs = resumePositionMs,
         subtitles = subtitles,
@@ -2245,6 +2277,10 @@ class EmbyRepository(private val settings: SettingsStore) {
         mediaSourceId = mediaSourceId,
         playSessionId = playSessionId,
         playMethod = playMethod,
+        subtitleDownloadAvailable = subtitleDownloadAvailable,
+        trickplayAvailable = trickplayAvailable,
+        skipIntroAvailable = skipIntroAvailable,
+        endCreditsAvailable = endCreditsAvailable,
     )
 
     /**
@@ -2753,6 +2789,7 @@ fun friendlyEmbyError(t: Throwable): String = when (t) {
         401 -> "Session expired. Open Memby to sign in again."
         403 -> "Access denied by the server."
         404 -> "Not found on the server."
+        429 -> retryAfterMessage(t)
         // The gateway answers 503 when an operator has deliberately taken Memby down.
         // Showing their message beats a generic "server problem" the viewer can do
         // nothing about.
@@ -2763,6 +2800,15 @@ fun friendlyEmbyError(t: Throwable): String = when (t) {
     else -> "Something went wrong. Try again."
 }
 
+private fun retryAfterMessage(t: HttpException): String {
+    val seconds = t.response()?.headers()?.get("Retry-After")?.trim()?.toLongOrNull()
+    return if (seconds != null && seconds > 0) {
+        "The server is busy. Try again in ${seconds.coerceAtMost(3_600)} seconds."
+    } else {
+        "The server is busy. Try again shortly."
+    }
+}
+
 private fun maintenanceMessage(t: HttpException): String? = runCatching {
     parseMaintenanceMessage(t.response()?.errorBody()?.string().orEmpty())
 }.getOrNull()

app/src/main/java/com/ponzischeme89/memby/data/MaintenanceMonitor.kt

@@ -211,6 +211,7 @@ class MaintenanceMonitor(
                 }
 
                 while (isActive) {
+                    var nextPollDelayMs = POLL_INTERVAL_MS
                     runCatching { repository.serviceStatus() }
                         .onSuccess { status ->
                             _compatibility.value = if (status.compatible) {
@@ -251,6 +252,13 @@ class MaintenanceMonitor(
                             }
                         }
                         .onFailure { error ->
+                            if (error is retrofit2.HttpException && error.code() == 429) {
+                                nextPollDelayMs = error.response()?.headers()?.get("Retry-After")
+                                    ?.trim()?.toLongOrNull()
+                                    ?.coerceIn(1L, MAX_RATE_LIMIT_SECONDS)
+                                    ?.times(1_000L)
+                                    ?: RATE_LIMIT_FALLBACK_MS
+                            }
                             if (isUnauthorizedError(error)) {
                                 repository.invalidateSession()
                                 _notice.value = null
@@ -266,7 +274,7 @@ class MaintenanceMonitor(
                                 return@collectLatest
                             }
                         }
-                    delay(POLL_INTERVAL_MS)
+                    delay(nextPollDelayMs)
                 }
             }
         }
@@ -358,6 +366,8 @@ class MaintenanceMonitor(
 
     companion object {
         internal const val POLL_INTERVAL_MS = 10_000L
+        internal const val RATE_LIMIT_FALLBACK_MS = 60_000L
+        internal const val MAX_RATE_LIMIT_SECONDS = 3_600L
 
         /** Matches `featureInstallPermission` in the gateway's feature catalogue. */
         internal const val INSTALL_PERMISSION_FEATURE = "install_permission_prompt"

app/src/main/java/com/ponzischeme89/memby/data/PreferencesSync.kt

@@ -6,8 +6,12 @@ import androidx.lifecycle.repeatOnLifecycle
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.currentCoroutineContext
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
@@ -68,11 +72,7 @@ class PreferencesSync(
                 // and be considered for a push.
                 .map { (session, revision) -> SyncTrigger(session, revision) }
                 .distinctUntilChanged()
-                // Plain collect, not collectLatest: a reconcile that is cancelled halfway
-                // could leave [lastSynced] describing a document that was never written.
-                // These are short and serialised by the mutex, so waiting is cheaper than
-                // reasoning about a half-applied sync.
-                .collect(::reconcile)
+                .collectLatest(::reconcile)
         }
     }
 
@@ -95,21 +95,31 @@ class PreferencesSync(
 
     private suspend fun reconcile(trigger: SyncTrigger) {
         if (!ServerConfig.isGateway || !trigger.signedIn) return
-        mutex.withLock {
+        var retryDelayMs = INITIAL_RETRY_MS
+        while (currentCoroutineContext().isActive) {
+            val settled = mutex.withLock { reconcileOnce(trigger) }
+            if (settled) return
+            delay(retryDelayMs)
+            retryDelayMs = (retryDelayMs * 2).coerceAtMost(MAX_RETRY_MS)
+        }
+    }
+
+    /** One reconciliation attempt. False means the network failed and this trigger remains due. */
+    private suspend fun reconcileOnce(trigger: SyncTrigger): Boolean {
             val agreed = lastSynced?.takeIf { it.first == trigger.profileKey }?.second
 
             // Never synced on this TV, or the server has moved on without us. Pull first:
             // the server's copy is the shared truth, and a push here would overwrite a
             // change made on another television with this one's defaults.
             if (agreed == null || trigger.remoteRevision > trigger.localRevision) {
-                if (pull(trigger)) return
+                if (pull(trigger)) return true
+                return false
             }
 
             // Only a genuine local edit gets pushed. Anything else is either the document
             // just adopted or an unrelated part of Settings changing.
             val current = lastSynced?.takeIf { it.first == trigger.profileKey }?.second
-            if (current != null && current != trigger.local) push(trigger)
-        }
+            return current == null || current == trigger.local || push(trigger)
     }
 
     /**
@@ -123,8 +133,7 @@ class PreferencesSync(
         // so they are pushed up rather than replaced by catalogue defaults.
         if (remote.revision == 0L) {
             lastSynced = trigger.profileKey to UserPreferences()
-            push(trigger)
-            return true
+            return push(trigger)
         }
         val decoded = decodeUserPreferences(remote.preferences, fallback = trigger.local)
         lastSynced = trigger.profileKey to decoded
@@ -135,10 +144,10 @@ class PreferencesSync(
         return true
     }
 
-    private suspend fun push(trigger: SyncTrigger) {
+    private suspend fun push(trigger: SyncTrigger): Boolean {
         val stored = runCatching {
             repository.saveUserPreferences(trigger.localRevision, trigger.local.encode())
-        }.getOrNull() ?: return
+        }.getOrNull() ?: return false
 
         // A 409 comes back here as an ordinary result carrying somebody else's document —
         // an operator's push, nearly always. Adopting it is the correct outcome: this TV
@@ -160,5 +169,11 @@ class PreferencesSync(
                     .onFailure { lastSynced = null }
             }
         }
+        return true
+    }
+
+    private companion object {
+        const val INITIAL_RETRY_MS = 1_000L
+        const val MAX_RETRY_MS = 60_000L
     }
 }

app/src/main/java/com/ponzischeme89/memby/data/ThemeSync.kt

@@ -10,10 +10,14 @@ import com.ponzischeme89.memby.ui.theme.applyMembyPalette
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.currentCoroutineContext
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
@@ -100,9 +104,7 @@ class ThemeSync(
                 SyncTrigger(session, status)
             }
                 .distinctUntilChanged()
-                // Plain collect rather than collectLatest: a fetch cancelled halfway could
-                // leave the stored revision describing a palette that was never written.
-                .collect(::reconcile)
+                .collectLatest(::reconcile)
         }
     }
 
@@ -139,12 +141,18 @@ class ThemeSync(
         ) {
             return
         }
-        mutex.withLock { fetch(trigger.serverRevision) }
+        var retryDelayMs = INITIAL_RETRY_MS
+        while (currentCoroutineContext().isActive) {
+            val fetched = mutex.withLock { fetch(trigger.serverRevision) }
+            if (fetched) return
+            delay(retryDelayMs)
+            retryDelayMs = (retryDelayMs * 2).coerceAtMost(MAX_RETRY_MS)
+        }
     }
 
-    private suspend fun fetch(expectedRevision: String) {
-        if (appliedRevision == expectedRevision) return
-        val document = runCatching { repository.theme() }.getOrNull() ?: return
+    private suspend fun fetch(expectedRevision: String): Boolean {
+        if (appliedRevision == expectedRevision) return true
+        val document = runCatching { repository.theme() }.getOrNull() ?: return false
         val resolved = document.theme
         _theme.value = resolved
         _available.value = document.available
@@ -165,6 +173,7 @@ class ThemeSync(
             // now and pays one extra fetch on its next cold start. Clearing the applied
             // revision would instead make it refetch on every poll.
         }
+        return true
     }
 
     /**
@@ -181,4 +190,9 @@ class ThemeSync(
         }.getOrNull() ?: return
         applyMembyPalette(palette.toMembyPalette())
     }
+
+    private companion object {
+        const val INITIAL_RETRY_MS = 1_000L
+        const val MAX_RETRY_MS = 60_000L
+    }
 }

app/src/main/java/com/ponzischeme89/memby/data/model/EmbyModels.kt

@@ -377,7 +377,9 @@ data class EmbyChapter(
 
 @Serializable
 data class BaseItem(
-    @SerialName("Id") val id: String,
+    // Defaulted so one partially populated upstream object does not reject an otherwise
+    // useful list. Entry points discard blank ids before handing data to keyed TV lists.
+    @SerialName("Id") val id: String = "",
     @SerialName("Name") val name: String = "",
     @SerialName("Type") val type: String = "",
     @SerialName("Overview") val overview: String? = null,

app/src/main/java/com/ponzischeme89/memby/data/model/GatewayModels.kt

@@ -56,8 +56,8 @@ data class GatewayDeviceNameRequest(val deviceName: String)
  */
 @Serializable
 data class HomeRow(
-    val id: String,
-    val title: String,
+    val id: String = "",
+    val title: String = "",
     val kind: String = "",
     val items: List<BaseItem> = emptyList(),
 )
@@ -636,6 +636,10 @@ data class GatewayNextEpisode(
     val mediaSourceId: String = "",
     val playSessionId: String = "",
     val playMethod: String = "DirectPlay",
+    val subtitleDownloadAvailable: Boolean = false,
+    val trickplayAvailable: Boolean = false,
+    val skipIntroAvailable: Boolean = false,
+    val endCreditsAvailable: Boolean = false,
 )
 
 @Serializable
@@ -653,8 +657,8 @@ data class GatewayFlagRequest(
 
 @Serializable
 data class MyShow(
-    val itemId: String,
-    val title: String,
+    val itemId: String = "",
+    val title: String = "",
     val year: Int? = null,
     val imageTag: String = "",
     val addedAt: String = "",
@@ -686,7 +690,7 @@ data class NotificationPreferences(
 
 @Serializable
 data class UserNotification(
-    val id: Long,
+    val id: Long = 0,
     val kind: String = "",
     val itemId: String = "",
     val title: String = "",

app/src/main/java/com/ponzischeme89/memby/ui/EpisodeDetailsOverlay.kt

@@ -105,12 +105,22 @@ fun EpisodeDetailsOverlay(
             episodes = emptyList()
             return@LaunchedEffect
         }
-        runCatching { repository.getSeriesEpisodes(seriesId) }
-            .onSuccess { episodes = it.sortedWith(seriesEpisodeComparator) }
-            .onFailure {
-                loadFailed = true
-                episodes = emptyList()
-            }
+        var retryDelayMs = 2_000L
+        while (true) {
+            runCatching { repository.getSeriesEpisodes(seriesId) }
+                .onSuccess {
+                    loadFailed = false
+                    episodes = it.sortedWith(seriesEpisodeComparator)
+                    return@LaunchedEffect
+                }
+                .onFailure { error ->
+                    if (error is kotlinx.coroutines.CancellationException) throw error
+                    loadFailed = true
+                    episodes = emptyList()
+                }
+            delay(retryDelayMs)
+            retryDelayMs = (retryDelayMs * 2).coerceAtMost(60_000L)
+        }
     }
     LaunchedEffect(item.id, settings.showRatingsStrip) {
         ratings = if (settings.showRatingsStrip) repository.getRatings(item) else emptyList()

app/src/main/java/com/ponzischeme89/memby/ui/HomeViewModel.kt

@@ -160,6 +160,9 @@ class HomeViewModel(private val repository: EmbyRepository) : ViewModel() {
     private val _forYou = MutableStateFlow(ForYouUiState())
     val forYou: StateFlow<ForYouUiState> = _forYou.asStateFlow()
     private var metadataJob: Job? = null
+    private var refreshJob: Job? = null
+    private var forYouJob: Job? = null
+    private var forYouRequestId = 0L
     private val metadataCache = object : LinkedHashMap<String, BaseItem>(32, 0.75f, true) {
         override fun removeEldestEntry(eldest: MutableMap.MutableEntry<String, BaseItem>?): Boolean = size > 32
     }
@@ -222,11 +225,14 @@ class HomeViewModel(private val repository: EmbyRepository) : ViewModel() {
 
     fun loadForYou(availableMinutes: Int = _forYou.value.availableMinutes) {
         val minutes = availableMinutes.coerceIn(0, 360)
+        val requestId = ++forYouRequestId
+        forYouJob?.cancel()
         _focusedItem.value = null
         _forYou.update { it.copy(availableMinutes = minutes, loading = true, error = null) }
-        viewModelScope.launch(Dispatchers.IO) {
+        forYouJob = viewModelScope.launch(Dispatchers.IO) {
             runCatching { repository.getForYou(minutes) }
                 .onSuccess { built ->
+                    if (requestId != forYouRequestId) return@onSuccess
                     val rows = built.sanitisedRows()
                     _forYou.value = ForYouUiState(
                         rows = rows,
@@ -235,7 +241,9 @@ class HomeViewModel(private val repository: EmbyRepository) : ViewModel() {
                     )
                     rows.firstNotNullOfOrNull { it.items.firstOrNull() }?.let(::focusItem)
                 }
-                .onFailure {
+                .onFailure { error ->
+                    if (error is kotlinx.coroutines.CancellationException) throw error
+                    if (requestId != forYouRequestId) return@onFailure
                     _forYou.update {
                         it.copy(
                             loading = false,
@@ -247,23 +255,32 @@ class HomeViewModel(private val repository: EmbyRepository) : ViewModel() {
     }
 
     fun refreshAll() {
-        viewModelScope.launch(Dispatchers.IO) {
-            refreshMutex.withLock {
-                // A refresh can make a newly imported episode the next playable item for
-                // an existing series ID. Never launch the pre-refresh negotiated session.
-                repository.invalidatePlaybackPrefetch()
-                _state.update { it.copy(loading = HomeSection.entries.toSet(), hasRefreshError = false) }
-                if (repository.supportsBatchHome) {
-                    loadBatchHome()
-                } else {
-                    coroutineScope {
-                        launch { loadContinueWatching() }
-                        launch { loadFavorites() }
-                        launch { loadLatest() }
+        // One recovery loop owns refreshes. Repeated Select presses while a request is
+        // slow therefore do not queue a burst that hits the server after it recovers.
+        if (refreshJob?.isActive == true) return
+        refreshJob = viewModelScope.launch(Dispatchers.IO) {
+            var retryDelayMs = HOME_RETRY_INITIAL_MS
+            do {
+                refreshMutex.withLock {
+                    // A refresh can make a newly imported episode the next playable item for
+                    // an existing series ID. Never launch the pre-refresh negotiated session.
+                    repository.invalidatePlaybackPrefetch()
+                    _state.update { it.copy(loading = HomeSection.entries.toSet(), hasRefreshError = false) }
+                    if (repository.supportsBatchHome) {
+                        loadBatchHome()
+                    } else {
+                        coroutineScope {
+                            launch { loadContinueWatching() }
+                            launch { loadFavorites() }
+                            launch { loadLatest() }
+                        }
                     }
+                    persistCurrentHome()
                 }
-                persistCurrentHome()
-            }
+                if (!_state.value.hasRefreshError) return@launch
+                delay(retryDelayMs)
+                retryDelayMs = (retryDelayMs * 2).coerceAtMost(HOME_RETRY_MAX_MS)
+            } while (true)
         }
     }
 
@@ -602,12 +619,15 @@ class HomeViewModel(private val repository: EmbyRepository) : ViewModel() {
          */
         private const val DETAIL_PREFETCH_DELAY_MS = 450L
         private const val ANALYTICS_FLUSH_INTERVAL_MS = 20_000L
+        private const val HOME_RETRY_INITIAL_MS = 2_000L
+        private const val HOME_RETRY_MAX_MS = 60_000L
 
         private fun initialFocusedItem(state: HomeUiState): BaseItem? =
             state.continueWatching.firstOrNull()
                 ?: state.latestMovies.firstOrNull()
                 ?: state.favorites.firstOrNull()
     }
+
 }
 
 /**

app/src/main/java/com/ponzischeme89/memby/ui/ListKeys.kt

@@ -39,7 +39,8 @@ internal inline fun <T, K> List<T>.distinctForKeys(selector: (T) -> K): List<T>
 }
 
 /** [distinctForKeys] for the one shape most of these lists have. */
-internal fun List<BaseItem>.distinctItems(): List<BaseItem> = distinctForKeys(BaseItem::id)
+internal fun List<BaseItem>.distinctItems(): List<BaseItem> =
+    filter { it.id.isNotBlank() }.distinctForKeys(BaseItem::id)
 
 /**
  * A home payload safe to render: rows unique by row id, and each row's cards unique by
@@ -52,7 +53,7 @@ internal fun List<BaseItem>.distinctItems(): List<BaseItem> = distinctForKeys(Ba
  * whichever row holds them, taking the launcher down just the same.
  */
 internal fun List<HomeRow>.sanitisedRows(): List<HomeRow> =
-    distinctForKeys(HomeRow::id).map { row ->
+    filter { it.id.isNotBlank() }.distinctForKeys(HomeRow::id).map { row ->
         val items = row.items.distinctItems()
         if (items.size == row.items.size) row else row.copy(items = items)
     }

app/src/main/java/com/ponzischeme89/memby/ui/MainActivity.kt

@@ -122,6 +122,7 @@ import com.ponzischeme89.memby.BuildConfig
 import com.ponzischeme89.memby.ServiceLocator
 import com.ponzischeme89.memby.data.Settings
 import com.ponzischeme89.memby.data.EmbyProfile
+import com.ponzischeme89.memby.data.friendlyEmbyError
 import com.ponzischeme89.memby.data.model.BaseItem
 import com.ponzischeme89.memby.data.model.GatewayUpdate
 import com.ponzischeme89.memby.data.model.HomeRow
@@ -1898,10 +1899,16 @@ private fun HomeScreen(
     var quickMenuRowId by remember { mutableStateOf<String?>(null) }
     var focusedHomeRowId by remember { mutableStateOf<String?>(null) }
     var myShows by remember(settings.userId) { mutableStateOf<List<MyShow>>(emptyList()) }
+    var myShowsLoading by remember(settings.userId) { mutableStateOf(true) }
+    var myShowsError by remember(settings.userId) { mutableStateOf<String?>(null) }
+    var myShowsMutationBusy by remember(settings.userId) { mutableStateOf(false) }
     var selectedMyShow by remember { mutableStateOf<MyShow?>(null) }
     var myShowReturnItemId by remember { mutableStateOf<String?>(null) }
     var removingMyShow by remember { mutableStateOf(false) }
     var notificationState by remember(settings.userId) { mutableStateOf(NotificationsResponse()) }
+    var notificationsLoading by remember(settings.userId) { mutableStateOf(true) }
+    var notificationsError by remember(settings.userId) { mutableStateOf<String?>(null) }
+    var notificationsMutationBusy by remember(settings.userId) { mutableStateOf(false) }
     var showNotifications by remember { mutableStateOf(false) }
     // Two different things: [launchingItem] is the gate that stops a second Play press
     // stacking a second player, and stays shut until one comes back. [resolvingItem] is
@@ -1983,8 +1990,16 @@ private fun HomeScreen(
         // routes into the player, including the one that hands over without waiting.
         launchingItem = null
         scope.launch {
-			runCatching { repo.getMyShows() }.onSuccess { myShows = it }
-			runCatching { repo.getNotifications() }.onSuccess { notificationState = it }
+			myShowsLoading = true
+			notificationsLoading = true
+			runCatching { repo.getMyShows() }
+				.onSuccess { myShows = it; myShowsError = null }
+				.onFailure { myShowsError = friendlyEmbyError(it) }
+			runCatching { repo.getNotifications() }
+				.onSuccess { notificationState = it; notificationsError = null }
+				.onFailure { notificationsError = friendlyEmbyError(it) }
+			myShowsLoading = false
+			notificationsLoading = false
             kotlinx.coroutines.delay(32L)
             if (returnRowId != null && returnItemId != null) {
                 requestFirstAvailableFocus(
@@ -1999,8 +2014,16 @@ private fun HomeScreen(
     }
 
     LaunchedEffect(settings.userId) {
-        runCatching { repo.getMyShows() }.onSuccess { myShows = it }
-        runCatching { repo.getNotifications() }.onSuccess { notificationState = it }
+        myShowsLoading = true
+        notificationsLoading = true
+        runCatching { repo.getMyShows() }
+            .onSuccess { myShows = it; myShowsError = null }
+            .onFailure { myShowsError = friendlyEmbyError(it) }
+        runCatching { repo.getNotifications() }
+            .onSuccess { notificationState = it; notificationsError = null }
+            .onFailure { notificationsError = friendlyEmbyError(it) }
+        myShowsLoading = false
+        notificationsLoading = false
     }
 
     LaunchedEffect(liveMaintenance) {
@@ -2093,8 +2116,9 @@ private fun HomeScreen(
                     playable
                 }
                     .onSuccess { playable ->
-                        playbackLauncher.launch(
-                            PlayerActivity.intent(
+                        val launched = runCatching {
+                            playbackLauncher.launch(
+                                PlayerActivity.intent(
                                 context = context,
                                 itemId = playable.itemId,
                                 url = playable.url,
@@ -2118,8 +2142,13 @@ private fun HomeScreen(
                                 playSessionId = playable.playSessionId,
                                 playMethod = playable.playMethod,
                                 requestStartedAtMs = playbackRequestedAtMs,
-                            ),
-                        )
+                                ),
+                            )
+                        }
+                        if (launched.isFailure) {
+                            Toast.makeText(context, "Couldn’t start playback", Toast.LENGTH_SHORT).show()
+                            launchingItem = null
+                        }
                     }
                     .onFailure { error ->
                         // A cancellation is the viewer having pressed Back out of the
@@ -2665,6 +2694,18 @@ private fun HomeScreen(
                             item(key = "my-shows", contentType = "my-shows") {
                                 MyShowsStrip(
                                     shows = myShows,
+                                    loading = myShowsLoading,
+                                    errorMessage = myShowsError,
+                                    onRetry = {
+                                        if (!myShowsLoading) scope.launch {
+                                            myShowsLoading = true
+                                            myShowsError = null
+                                            runCatching { repo.getMyShows() }
+                                                .onSuccess { myShows = it }
+                                                .onFailure { myShowsError = friendlyEmbyError(it) }
+                                            myShowsLoading = false
+                                        }
+                                    },
                                     repository = repo,
                                     availableWidth = contentWidth,
                                     density = settings.homeCardDensity,
@@ -2958,8 +2999,12 @@ private fun HomeScreen(
                     navigationExpanded = false
                     showNotifications = true
                     scope.launch {
+                        notificationsLoading = true
+                        notificationsError = null
                         runCatching { repo.getNotifications() }
                             .onSuccess { notificationState = it }
+                            .onFailure { notificationsError = friendlyEmbyError(it) }
+                        notificationsLoading = false
                     }
                 },
                 onDismiss = {
@@ -3144,6 +3189,8 @@ private fun HomeScreen(
                     // — a request the viewer has no reason to sit through watching an
                     // unchanged button. The row that lands a moment later replaces this
                     // placeholder; a failure puts the button back where it was.
+                    if (myShowsMutationBusy) return@FocusedDetailsOverlay
+                    myShowsMutationBusy = true
                     val previous = myShows
                     myShows = if (saved) {
                         myShows.filterNot { it.itemId == item.id } + myShowStub(item)
@@ -3166,6 +3213,7 @@ private fun HomeScreen(
                             runCatching { repo.removeMyShow(item.id) }
                                 .onFailure { myShows = previous }
                         }
+                        myShowsMutationBusy = false
                     }
                 },
                 onTogglePlayed = { item, played ->
@@ -3235,22 +3283,42 @@ private fun HomeScreen(
             MyAlertsPage(
                 notifications = notificationState.notifications,
                 preferences = notificationState.preferences,
+                loading = notificationsLoading,
+                errorMessage = notificationsError,
+                onRetry = {
+                    if (!notificationsLoading) scope.launch {
+                        notificationsLoading = true
+                        notificationsError = null
+                        runCatching { repo.getNotifications() }
+                            .onSuccess { notificationState = it }
+                            .onFailure { notificationsError = friendlyEmbyError(it) }
+                        notificationsLoading = false
+                    }
+                },
                 onToggleEnabled = {
+                    if (notificationsMutationBusy) return@MyAlertsPage
+                    notificationsMutationBusy = true
                     scope.launch {
                         val updated = notificationState.preferences.copy(
                             enabled = !notificationState.preferences.enabled,
                         )
                         runCatching { repo.setNotificationPreferences(updated) }
                             .onSuccess { notificationState = it }
+                            .onFailure { notificationsError = friendlyEmbyError(it) }
+                        notificationsMutationBusy = false
                     }
                 },
                 onToggleShowReturns = {
+                    if (notificationsMutationBusy) return@MyAlertsPage
+                    notificationsMutationBusy = true
                     scope.launch {
                         val updated = notificationState.preferences.copy(
                             showReturnAlerts = !notificationState.preferences.showReturnAlerts,
                         )
                         runCatching { repo.setNotificationPreferences(updated) }
                             .onSuccess { notificationState = it }
+                            .onFailure { notificationsError = friendlyEmbyError(it) }
+                        notificationsMutationBusy = false
                     }
                 },
                 // Marked read locally first. This fires on *focus*, so on a slow
@@ -3258,12 +3326,27 @@ private fun HomeScreen(
                 // request once per pass — clearing the flag immediately is what makes the
                 // row stop asking.
                 onRead = { notification ->
+                    val previousReadAt = notification.readAt
                     notificationState = notificationState.copy(
                         notifications = notificationState.notifications.map {
                             if (it.id == notification.id) it.copy(readAt = "now") else it
                         },
                     )
-                    scope.launch { runCatching { repo.markNotificationRead(notification.id) } }
+                    scope.launch {
+                        runCatching { repo.markNotificationRead(notification.id) }
+                            .onFailure { failure ->
+                                notificationState = notificationState.copy(
+                                    notifications = notificationState.notifications.map {
+                                        if (it.id == notification.id) {
+                                            it.copy(readAt = previousReadAt)
+                                        } else {
+                                            it
+                                        }
+                                    },
+                                )
+                                notificationsError = friendlyEmbyError(failure)
+                            }
+                    }
                 },
                 // Optimistic, for the reason "Dismiss all" beneath it already is: this
                 // page is judged entirely on emptying itself, and a row that stayed put
@@ -3271,6 +3354,8 @@ private fun HomeScreen(
                 // page also re-aims where focus lands afterwards. A failure puts the row
                 // back where it was rather than quietly losing somebody's alert.
                 onDismiss = { notification ->
+                    if (notificationsMutationBusy) return@MyAlertsPage
+                    notificationsMutationBusy = true
                     val previous = notificationState
                     notificationState = notificationState.copy(
                         notifications = notificationState.notifications.filterNot {
@@ -3279,7 +3364,11 @@ private fun HomeScreen(
                     )
                     scope.launch {
                         runCatching { repo.dismissNotification(notification.id) }
-                            .onFailure { notificationState = previous }
+                            .onFailure { failure ->
+                                notificationState = previous
+                                notificationsError = friendlyEmbyError(failure)
+                            }
+                        notificationsMutationBusy = false
                     }
                 },
                 // The gateway has no bulk route, so this is the same call per alert. The
@@ -3287,12 +3376,25 @@ private fun HomeScreen(
                 // and a row that lingered while its request was in flight would be pressed
                 // a second time.
                 onDismissAll = {
+                    if (notificationsMutationBusy) return@MyAlertsPage
+                    notificationsMutationBusy = true
+                    val previous = notificationState
                     val pending = notificationState.notifications.map(UserNotification::id)
                     notificationState = notificationState.copy(notifications = emptyList())
                     scope.launch {
-                        pending.forEach { id -> runCatching { repo.dismissNotification(id) } }
+                        val failed = pending.filter { id ->
+                            runCatching { repo.dismissNotification(id) }.isFailure
+                        }
                         runCatching { repo.getNotifications() }
                             .onSuccess { notificationState = it }
+                            .onFailure { failure ->
+                                notificationState = previous
+                                notificationsError = friendlyEmbyError(failure)
+                            }
+                        if (failed.isNotEmpty()) {
+                            notificationsError = "Some alerts couldn’t be dismissed. Try again."
+                        }
+                        notificationsMutationBusy = false
                     }
                 },
                 onClose = closeAlerts,

app/src/main/java/com/ponzischeme89/memby/ui/MyShowsNotifications.kt

@@ -56,6 +56,9 @@ import java.time.format.DateTimeFormatter
 @Composable
 internal fun MyShowsStrip(
     shows: List<MyShow>,
+    loading: Boolean = false,
+    errorMessage: String? = null,
+    onRetry: () -> Unit = {},
     repository: EmbyRepository,
     availableWidth: Dp,
     density: String,
@@ -96,7 +99,23 @@ internal fun MyShowsStrip(
                 )
             }
         }
-        if (shows.isEmpty()) {
+        if (shows.isEmpty() && loading) {
+            Text(
+                "Loading My Shows…",
+                color = MembyQuietText,
+                fontSize = 14.sp,
+                modifier = Modifier.padding(horizontal = 36.dp, vertical = 18.dp),
+            )
+        } else if (shows.isEmpty() && errorMessage != null) {
+            Row(
+                modifier = Modifier.padding(horizontal = 36.dp, vertical = 10.dp),
+                horizontalArrangement = Arrangement.spacedBy(12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(errorMessage, color = MembyQuietText, fontSize = 14.sp)
+                MembyChoiceChip(label = "Try again", selected = false, onClick = onRetry)
+            }
+        } else if (shows.isEmpty()) {
             Text(
                 "Open any series and choose “Add to My Shows”.",
                 color = MembyQuietText,
@@ -104,6 +123,14 @@ internal fun MyShowsStrip(
                 modifier = Modifier.padding(horizontal = 36.dp, vertical = 18.dp),
             )
         } else {
+            if (loading || errorMessage != null) {
+                Text(
+                    if (loading) "Refreshing My Shows…" else "Couldn’t refresh My Shows — showing saved results.",
+                    color = MembyQuietText,
+                    fontSize = 12.sp,
+                    modifier = Modifier.padding(horizontal = 36.dp),
+                )
+            }
             val cardsAcross = when (density) {
                 "compact" -> 8
                 "large" -> 5

app/src/main/java/com/ponzischeme89/memby/ui/SeriesDetailsOverlay.kt

@@ -121,12 +121,21 @@ fun SeriesDetailsOverlay(
     var ratings by remember(item.id) { mutableStateOf<List<MediaRating>>(emptyList()) }
 
     LaunchedEffect(item.id) {
-        runCatching { repository.getSeriesEpisodes(item.id) }
-            .onSuccess { episodes = it.sortedWith(seriesEpisodeComparator) }
-            .onFailure {
+        var retryDelayMs = 2_000L
+        while (true) {
+            val loaded = runCatching { repository.getSeriesEpisodes(item.id) }
+            loaded.onSuccess {
+                loadFailed = false
+                episodes = it.sortedWith(seriesEpisodeComparator)
+                return@LaunchedEffect
+            }.onFailure { error ->
+                if (error is kotlinx.coroutines.CancellationException) throw error
                 loadFailed = true
                 episodes = emptyList()
             }
+            kotlinx.coroutines.delay(retryDelayMs)
+            retryDelayMs = (retryDelayMs * 2).coerceAtMost(60_000L)
+        }
     }
     // Separate from the episode request on purpose: the two are independent, and the page
     // must not wait on "more like this" to show a show's own episodes.

app/src/main/java/com/ponzischeme89/memby/ui/alerts/AlertsPage.kt

@@ -85,6 +85,9 @@ import kotlinx.coroutines.delay
 fun MyAlertsPage(
     notifications: List<UserNotification>,
     preferences: NotificationPreferences,
+    loading: Boolean = false,
+    errorMessage: String? = null,
+    onRetry: () -> Unit = {},
     onToggleEnabled: () -> Unit,
     onToggleShowReturns: () -> Unit,
     onRead: (UserNotification) -> Unit,
@@ -165,12 +168,19 @@ fun MyAlertsPage(
                         onClick = onDismissAll,
                     )
                 }
+                if (errorMessage != null) {
+                    MembyChoiceChip(label = "Try again", selected = false, onClick = onRetry)
+                }
                 Spacer(Modifier.weight(1f))
                 MembyChoiceChip(label = "Close", selected = false, onClick = onClose)
             }
             Spacer(Modifier.height(18.dp))
             Box(Modifier.fillMaxWidth().height(1.dp).background(MembyHairline))
-            if (!hasAlerts) {
+            if (loading && !hasAlerts) {
+                AlertsNotice("Loading alerts…")
+            } else if (errorMessage != null && !hasAlerts) {
+                AlertsNotice(errorMessage)
+            } else if (!hasAlerts) {
                 AlertsEmptyState(enabled = preferences.enabled)
             } else {
                 LazyColumn(
@@ -205,6 +215,13 @@ fun MyAlertsPage(
     }
 }
 
+@Composable
+private fun AlertsNotice(message: String) {
+    Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+        Text(message, color = MembyQuietText, fontSize = 15.sp)
+    }
+}
+
 /** The row now occupying the removed row's place, or the preceding row at the end. */
 internal fun alertFocusIndexAfterRemoval(removedIndex: Int, remainingCount: Int): Int? =
     if (remainingCount <= 0) null else removedIndex.coerceIn(0, remainingCount - 1)

app/src/main/java/com/ponzischeme89/memby/ui/genre/GenreBrowseViewModel.kt

@@ -170,6 +170,7 @@ class GenreBrowseViewModel(
                 )
             }
         }.onFailure { error ->
+            if (error is kotlinx.coroutines.CancellationException) throw error
             _state.update { current ->
                 if (current.selectedCategoryId != category.id) current else current.copy(
                     isLoading = false,

app/src/main/java/com/ponzischeme89/memby/ui/player/PlaybackRecovery.kt

@@ -56,7 +56,6 @@ internal fun describePlaybackFailure(errorCode: Int): PlaybackFailure =
             requiresTranscode = true,
         )
 
-        PlaybackException.ERROR_CODE_PARSING_CONTAINER_MALFORMED,
         PlaybackException.ERROR_CODE_PARSING_CONTAINER_UNSUPPORTED,
         PlaybackException.ERROR_CODE_PARSING_MANIFEST_UNSUPPORTED,
         -> PlaybackFailure(

app/src/main/java/com/ponzischeme89/memby/ui/player/PlaybackStopWorker.kt

@@ -7,6 +7,8 @@ import androidx.work.ExistingWorkPolicy
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.WorkManager
 import androidx.work.WorkerParameters
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 import com.ponzischeme89.memby.ServiceLocator
 import com.ponzischeme89.memby.data.PlaybackSession
 
@@ -47,6 +49,9 @@ class PlaybackStopWorker(
         private const val POSITION_MS = "position_ms"
         private const val MAX_RETRIES = 5
 
+        private fun workName(session: PlaybackSession): String =
+            "emby-playback-stop-${session.playSessionId.ifBlank { session.itemId }}"
+
         fun enqueue(context: Context, session: PlaybackSession, positionMs: Long) {
             val data = Data.Builder()
                 .putString(ITEM_ID, session.itemId)
@@ -58,12 +63,19 @@ class PlaybackStopWorker(
             val request = OneTimeWorkRequestBuilder<PlaybackStopWorker>()
                 .setInputData(data)
                 .build()
-            val key = session.playSessionId.ifBlank { session.itemId }
             WorkManager.getInstance(context.applicationContext).enqueueUniqueWork(
-                "emby-playback-stop-$key",
+                workName(session),
                 ExistingWorkPolicy.REPLACE,
                 request,
             )
         }
+
+        /** A resumed session must not be stopped later by work queued while backgrounded. */
+        suspend fun cancel(context: Context, session: PlaybackSession) = withContext(Dispatchers.IO) {
+            WorkManager.getInstance(context.applicationContext)
+                .cancelUniqueWork(workName(session))
+                .result
+                .get()
+        }
     }
 }

app/src/main/java/com/ponzischeme89/memby/ui/player/PlayerActivity.kt

@@ -92,6 +92,7 @@ import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.isActive
@@ -113,6 +114,9 @@ class PlayerActivity : ComponentActivity() {
     private var player: ExoPlayer? = null
     private var playerView: PlayerView? = null
     private var progressJob: Job? = null
+    private var playbackStartReportJob: Job? = null
+    private var progressUploadJob: Job? = null
+    private val progressReports = Channel<PendingProgressReport>(Channel.CONFLATED)
     private var playbackStarted = false
     private var initialResumePositionMs = 0L
     private var stopReported = false
@@ -138,6 +142,7 @@ class PlayerActivity : ComponentActivity() {
     private var errorDetailView: TextView? = null
     private var streamStatusView: TextView? = null
     private var retryJob: Job? = null
+    private var retryGeneration = 0L
     private var stablePlaybackJob: Job? = null
     private var prolongedRebufferJob: Job? = null
     private var prolongedRebufferRecoveryAttempted = false
@@ -154,6 +159,7 @@ class PlayerActivity : ComponentActivity() {
      */
     private var pendingRequest: PlaybackRequest? = null
     private var pendingResolveJob: Job? = null
+    private var pendingResolveGeneration = 0L
     private var serviceAlertsMounted = false
 
     // Open trace spans, or -1 for "not open". Held so they can be closed on destroy: a
@@ -257,10 +263,17 @@ class PlayerActivity : ComponentActivity() {
     private var nextEpisode: NextEpisode? = null
     private var returningHomeAfterCompletion = false
     private var nextUpJob: Job? = null
+    private var nextEpisodeLookupJob: Job? = null
     private var nextUpBanner: View? = null
     private var nextUpCountdown: TextView? = null
     private var nextUpDismissed = false
     private var advancing = false
+    private var encodedSubtitleJob: Job? = null
+    private var subtitleStreamGeneration = 0L
+    private var restoredPositionMs: Long? = null
+    private var restoredPlayWhenReady: Boolean? = null
+    private var relaunchingForNewIntent = false
+    private var retryAfterResume = false
 
     // Skipping the opening titles. [skipIntroSegment] is where Emby says they are, fetched
     // once playback has settled; the rest is what this episode's viewer has done about it.
@@ -390,7 +403,8 @@ class PlayerActivity : ComponentActivity() {
         // had a fresh prefetch in hand), or with the request that resolves one. The second
         // form exists so this activity, its layout and its decoder start while the server
         // is still being asked — see [PlaybackRequest].
-        val url = intent.getStringExtra(EXTRA_URL)?.takeIf(String::isNotBlank)
+        val url = savedInstanceState?.getString(STATE_URL)?.takeIf(String::isNotBlank)
+            ?: intent.getStringExtra(EXTRA_URL)?.takeIf(String::isNotBlank)
         val request = decodeRequest(intent.getStringExtra(EXTRA_PLAYBACK_REQUEST))
         pendingRequest = request.takeIf { url == null }
         if (url == null && request == null) {
@@ -398,11 +412,21 @@ class PlayerActivity : ComponentActivity() {
             return
         }
 
-        itemId = intent.getStringExtra(EXTRA_ITEM_ID)
-        mediaSourceId = intent.getStringExtra(EXTRA_MEDIA_SOURCE_ID).orEmpty()
-        playSessionId = intent.getStringExtra(EXTRA_PLAY_SESSION_ID).orEmpty()
-        playMethod = intent.getStringExtra(EXTRA_PLAY_METHOD) ?: "DirectPlay"
-        val resumePositionMs = intent.getLongExtra(EXTRA_RESUME_POSITION_MS, 0L)
+        itemId = savedInstanceState?.getString(STATE_ITEM_ID)
+            ?: intent.getStringExtra(EXTRA_ITEM_ID)
+        mediaSourceId = savedInstanceState?.getString(STATE_MEDIA_SOURCE_ID)
+            ?: intent.getStringExtra(EXTRA_MEDIA_SOURCE_ID).orEmpty()
+        playSessionId = savedInstanceState?.getString(STATE_PLAY_SESSION_ID)
+            ?: intent.getStringExtra(EXTRA_PLAY_SESSION_ID).orEmpty()
+        playMethod = savedInstanceState?.getString(STATE_PLAY_METHOD)
+            ?: intent.getStringExtra(EXTRA_PLAY_METHOD)
+            ?: "DirectPlay"
+        restoredPositionMs = savedInstanceState?.takeIf { it.containsKey(STATE_POSITION_MS) }
+            ?.getLong(STATE_POSITION_MS)
+        restoredPlayWhenReady = savedInstanceState?.takeIf { it.containsKey(STATE_PLAY_WHEN_READY) }
+            ?.getBoolean(STATE_PLAY_WHEN_READY)
+        val resumePositionMs = restoredPositionMs
+            ?: intent.getLongExtra(EXTRA_RESUME_POSITION_MS, 0L)
         initialResumePositionMs = resumePositionMs.coerceAtLeast(0L)
         val prerollEnabled = intent.getBooleanExtra(EXTRA_PREROLL_ENABLED, true)
         configuredPrerollDurationMs = intent.getLongExtra(
@@ -411,26 +435,36 @@ class PlayerActivity : ComponentActivity() {
         ).coerceIn(MIN_PREROLL_DURATION_MS, MAX_PREROLL_DURATION_MS)
         prerollDurationMs = configuredPrerollDurationMs
         val showPreroll = shouldShowPreroll(resumePositionMs, prerollEnabled)
-        val subtitles = decodeSubtitles(intent.getStringExtra(EXTRA_SUBTITLES))
+        val subtitles = decodeSubtitles(
+            savedInstanceState?.getString(STATE_SUBTITLES)
+                ?: intent.getStringExtra(EXTRA_SUBTITLES),
+        )
         availableSubtitles = subtitles
         // Falling back to this TV's copy of the setting rather than to `true` matters for
         // the request path, where the intent carries no answer yet: somebody who turned
         // subtitles off must not get them back for the seconds before one is resolved.
-        subtitlePreference = intent.getBooleanExtra(
-            EXTRA_SUBTITLES_ENABLED,
-            ServiceLocator.settings.current?.subtitlesEnabled ?: true,
-        )
-        serverSubtitleId = intent.getStringExtra(EXTRA_SELECTED_SUBTITLE_ID).orEmpty()
+        subtitlePreference = savedInstanceState?.takeIf { it.containsKey(STATE_SUBTITLES_ENABLED) }
+            ?.getBoolean(STATE_SUBTITLES_ENABLED)
+            ?: intent.getBooleanExtra(
+                EXTRA_SUBTITLES_ENABLED,
+                ServiceLocator.settings.current?.subtitlesEnabled ?: true,
+            )
+        serverSubtitleId = savedInstanceState?.getString(STATE_SELECTED_SUBTITLE_ID)
+            ?: intent.getStringExtra(EXTRA_SELECTED_SUBTITLE_ID).orEmpty()
         // Default false, not true: a missing extra must never conjure a section whose
         // only row leads to a request the backend cannot answer.
-        subtitleDownloadAvailable = intent.getBooleanExtra(EXTRA_SUBTITLE_DOWNLOAD, false)
+        subtitleDownloadAvailable = savedInstanceState?.getBoolean(STATE_SUBTITLE_DOWNLOAD)
+            ?: intent.getBooleanExtra(EXTRA_SUBTITLE_DOWNLOAD, false)
         // Same rule, and the same default, for the three that decide whether the previews,
         // the skip button and the credits pane are offered at all. On the request form of
         // the launch these are corrected by adoptPlayable once the server settles; on this
         // form the intent is the only thing that will ever say.
-        trickplayAvailable = intent.getBooleanExtra(EXTRA_TRICKPLAY, false)
-        skipIntroAvailable = intent.getBooleanExtra(EXTRA_SKIP_INTRO, false)
-        endCreditsAvailable = intent.getBooleanExtra(EXTRA_END_CREDITS, false)
+        trickplayAvailable = savedInstanceState?.getBoolean(STATE_TRICKPLAY)
+            ?: intent.getBooleanExtra(EXTRA_TRICKPLAY, false)
+        skipIntroAvailable = savedInstanceState?.getBoolean(STATE_SKIP_INTRO)
+            ?: intent.getBooleanExtra(EXTRA_SKIP_INTRO, false)
+        endCreditsAvailable = savedInstanceState?.getBoolean(STATE_END_CREDITS)
+            ?: intent.getBooleanExtra(EXTRA_END_CREDITS, false)
         Log.i(PLAYBACK_LOG_TAG, "event=subtitle_configs item=${itemId.orEmpty()} count=${subtitles.size}")
 
         setContentView(R.layout.activity_player)
@@ -475,13 +509,23 @@ class PlayerActivity : ComponentActivity() {
         remainingView = view.findViewById(R.id.player_remaining)
         finishTimeView = view.findViewById(R.id.player_finish_time)
         streamStatusView = view.findViewById(R.id.player_stream_status)
-        logoUrl = intent.getStringExtra(EXTRA_LOGO_URL)
-        playbackTitle = intent.getStringExtra(EXTRA_TITLE).orEmpty()
-        pauseOverview = intent.getStringExtra(EXTRA_OVERVIEW).orEmpty()
-        prerollEpisodeCode = intent.getStringExtra(EXTRA_EPISODE_CODE).orEmpty()
-        prerollRuntimeMs = intent.getLongExtra(EXTRA_RUNTIME_MS, 0L).coerceAtLeast(0L)
-        pausePosterUrl = intent.getStringExtra(EXTRA_POSTER_URL)
+        logoUrl = savedInstanceState?.getString(STATE_LOGO_URL)
+            ?: intent.getStringExtra(EXTRA_LOGO_URL)
+        playbackTitle = savedInstanceState?.getString(STATE_TITLE)
+            ?: intent.getStringExtra(EXTRA_TITLE).orEmpty()
+        pauseOverview = savedInstanceState?.getString(STATE_OVERVIEW)
+            ?: intent.getStringExtra(EXTRA_OVERVIEW).orEmpty()
+        prerollEpisodeCode = savedInstanceState?.getString(STATE_EPISODE_CODE)
+            ?: intent.getStringExtra(EXTRA_EPISODE_CODE).orEmpty()
+        prerollRuntimeMs = if (savedInstanceState?.containsKey(STATE_RUNTIME_MS) == true) {
+            savedInstanceState.getLong(STATE_RUNTIME_MS).coerceAtLeast(0L)
+        } else {
+            intent.getLongExtra(EXTRA_RUNTIME_MS, 0L).coerceAtLeast(0L)
+        }
+        pausePosterUrl = savedInstanceState?.getString(STATE_POSTER_URL)
+            ?: intent.getStringExtra(EXTRA_POSTER_URL)
         if (showPreroll) startPreroll() else startWithoutPreroll()
+        setUpPlaybackError()
 
         // --- The critical path ------------------------------------------------------
         // Everything above this point is what the player needs in order to open the
@@ -493,8 +537,23 @@ class PlayerActivity : ComponentActivity() {
         // first one cannot arrive until onCreate has returned.
         // Surround passthrough is settled before the sink is built, not after: an audio
         // sink cannot change its mind about bitstreaming a format once a track is open.
-        player = PlayerEngine.create(this, ServiceLocator.settings.current.audioPassthroughPreference)
-            .also { playback ->
+        val createdPlayer = runCatching {
+            PlayerEngine.create(this, ServiceLocator.settings.current.audioPassthroughPreference)
+        }.getOrElse { error ->
+            Log.e(PLAYBACK_LOG_TAG, "event=player_create_failed", error)
+            prerollActive = false
+            disposeLocalPreroll(reuse = false)
+            prerollView?.visibility = View.GONE
+            showPlaybackError(
+                PlaybackFailure(
+                    title = "Couldn’t start the video player",
+                    detail = "Memby couldn’t initialise this TV’s video decoder. Try again or return to Memby.",
+                    canAutoRetry = false,
+                ),
+            )
+            return
+        }
+        player = createdPlayer.also { playback ->
                 view.player = playback
                 trace.mark(PlaybackTrace.PLAYER_BUILT)
                 playback.addListener(object : Player.Listener {
@@ -530,7 +589,7 @@ class PlayerActivity : ComponentActivity() {
                     }
 
                     override fun onIsPlayingChanged(isPlaying: Boolean) {
-                        if (playbackStarted) {
+                        if (playbackStarted && !stopReported) {
                             reportProgress(
                                 playback.currentPosition,
                                 isPaused = !isPlaying,
@@ -548,7 +607,7 @@ class PlayerActivity : ComponentActivity() {
                         // only place that hears about it — without it the OSD it raised
                         // would sit on the picture for the rest of the film.
                         if (player.playbackState == Player.STATE_READY) endSeekBuffering()
-                        if (playbackStarted && events.contains(Player.EVENT_POSITION_DISCONTINUITY)) {
+                        if (playbackStarted && !stopReported && events.contains(Player.EVENT_POSITION_DISCONTINUITY)) {
                             reportProgress(player.currentPosition, !player.isPlaying, "TimeUpdate")
                         }
                     }
@@ -591,11 +650,32 @@ class PlayerActivity : ComponentActivity() {
 
         // Fresh playback waits in the pre-roll frame. A resumed item is already in its
         // full-screen parent and should begin as soon as it is ready.
-        if (url != null) {
-            trace.mark(PlaybackTrace.STREAM_RESOLVED)
-            startMedia(url, subtitles, resumePositionMs, playWhenReady = !showPreroll)
+        val startResolvedPlayback = {
+            if (url != null) {
+                trace.mark(PlaybackTrace.STREAM_RESOLVED)
+                startMedia(
+                    url,
+                    subtitles,
+                    resumePositionMs,
+                    playWhenReady = restoredPlayWhenReady ?: !showPreroll,
+                )
+            } else {
+                resolvePendingStream(
+                    requireNotNull(request),
+                    playWhenReady = restoredPlayWhenReady ?: !showPreroll,
+                )
+            }
+        }
+        val restoredId = itemId?.takeIf(String::isNotBlank).takeIf { savedInstanceState != null }
+        if (restoredId != null) {
+            showPlaybackLoading()
+            val restoredSession = playbackSession(restoredId)
+            lifecycleScope.launch {
+                runCatching { PlaybackStopWorker.cancel(this@PlayerActivity, restoredSession) }
+                if (!isFinishing && !isDestroyed && itemId == restoredId) startResolvedPlayback()
+            }
         } else {
-            resolvePendingStream(requireNotNull(request), playWhenReady = !showPreroll)
+            startResolvedPlayback()
         }
 
         // --- Decoration -------------------------------------------------------------
@@ -609,7 +689,6 @@ class PlayerActivity : ComponentActivity() {
         setUpEndCredits()
         setUpTimeRemainingCue()
         setUpSeasonFinaleCue()
-        setUpPlaybackError()
 
         lifecycleScope.launch {
             repeatOnLifecycle(Lifecycle.State.STARTED) {
@@ -628,9 +707,24 @@ class PlayerActivity : ComponentActivity() {
         playWhenReady: Boolean,
     ) {
         val playback = player ?: return
-        playback.setMediaItem(mediaItem(url, subtitles), positionMs.coerceAtLeast(0L))
-        playback.playWhenReady = playWhenReady
-        playback.prepare()
+        val prepared = runCatching {
+            require(url.isNotBlank()) { "Playback URL is blank" }
+            playback.setMediaItem(mediaItem(url, subtitles), positionMs.coerceAtLeast(0L))
+            playback.playWhenReady = playWhenReady
+            playback.prepare()
+        }
+        if (prepared.isFailure) {
+            Log.e(PLAYBACK_LOG_TAG, "event=media_prepare_failed item=${itemId.orEmpty()}", prepared.exceptionOrNull())
+            showPlaybackError(
+                PlaybackFailure(
+                    title = getString(R.string.playback_server_unreachable),
+                    detail = getString(R.string.playback_server_unreachable_detail),
+                    canAutoRetry = false,
+                    requiresFreshStream = true,
+                ),
+            )
+            return
+        }
         trace.mark(PlaybackTrace.PREPARED)
         endFirstFrameTrace()
         firstFrameTraceCookie = PlaybackTraceSections.nextCookie()
@@ -663,11 +757,14 @@ class PlayerActivity : ComponentActivity() {
      */
     private fun resolvePendingStream(request: PlaybackRequest, playWhenReady: Boolean) {
         showPlaybackLoading()
+        val generation = ++pendingResolveGeneration
         pendingResolveJob?.cancel()
         pendingResolveJob = lifecycleScope.launch {
             runCatching { ServiceLocator.repository.resolvePlayableForLaunch(request) }
                 .onSuccess { playable ->
-                    if (isFinishing || isDestroyed) return@onSuccess
+                    if (generation != pendingResolveGeneration || isFinishing || isDestroyed) {
+                        return@onSuccess
+                    }
                     // A resolution with no stream in it is a failure wearing a success's
                     // shape: handed to the player it becomes an empty URI, and what the
                     // viewer is told is whatever media3 makes of that rather than that the
@@ -693,12 +790,15 @@ class PlayerActivity : ComponentActivity() {
                     startMedia(
                         url = playable.url,
                         subtitles = playable.subtitles,
-                        positionMs = playable.resumePositionMs,
+                        positionMs = restoredPositionMs ?: playable.resumePositionMs,
                         playWhenReady = playWhenReady,
                     )
                 }
                 .onFailure { error ->
-                    if (isFinishing || isDestroyed) return@onFailure
+                    if (error is kotlinx.coroutines.CancellationException) throw error
+                    if (generation != pendingResolveGeneration || isFinishing || isDestroyed) {
+                        return@onFailure
+                    }
                     Log.e(
                         PLAYBACK_LOG_TAG,
                         "event=stream_resolve_failed item=${request.itemId}",
@@ -1197,6 +1297,10 @@ class PlayerActivity : ComponentActivity() {
             errorTitleView = overlay.findViewById(R.id.playback_error_title)
             errorDetailView = overlay.findViewById(R.id.playback_error_detail)
             overlay.findViewById<View>(R.id.playback_error_retry).setOnClickListener {
+                if (player == null) {
+                    recreate()
+                    return@setOnClickListener
+                }
                 automaticRetryAttempt = 0
                 retryPlayback(refreshSource = true)
             }
@@ -1214,6 +1318,7 @@ class PlayerActivity : ComponentActivity() {
             prerollView?.visibility = View.GONE
             playerView?.useController = true
         }
+        retryGeneration += 1
         retryJob?.cancel()
         prolongedRebufferJob?.cancel()
         prolongedRebufferJob = null
@@ -1260,6 +1365,7 @@ class PlayerActivity : ComponentActivity() {
     }
 
     private fun retryPlayback(refreshSource: Boolean, forceTranscode: Boolean = false) {
+        val generation = ++retryGeneration
         retryJob?.cancel()
         prolongedRebufferJob?.cancel()
         prolongedRebufferJob = null
@@ -1301,7 +1407,9 @@ class PlayerActivity : ComponentActivity() {
                     forceTranscode = forceTranscode,
                 )
             }.onSuccess { refreshed ->
-                if (isFinishing || isDestroyed) return@onSuccess
+                if (generation != retryGeneration || itemId != id || isFinishing || isDestroyed) {
+                    return@onSuccess
+                }
                 // Same rule as the launch path: a refresh that came back without a stream
                 // is reported as the server being unreachable rather than re-prepared as
                 // an empty URI, which would fail as a source error and be retried on the
@@ -1318,23 +1426,32 @@ class PlayerActivity : ComponentActivity() {
                     )
                     return@onSuccess
                 }
-                itemId = refreshed.itemId
-                mediaSourceId = refreshed.mediaSourceId
-                playSessionId = refreshed.playSessionId
-                playMethod = refreshed.playMethod
+                adoptReplacementSession(
+                    newItemId = refreshed.itemId,
+                    newMediaSourceId = refreshed.mediaSourceId,
+                    newPlaySessionId = refreshed.playSessionId,
+                    newPlayMethod = refreshed.playMethod,
+                    positionMs = positionMs,
+                )
                 availableSubtitles = refreshed.subtitles
                 subtitlePreference = refreshed.subtitlesEnabled
                 serverSubtitleId = refreshed.selectedSubtitleId
+                subtitleDownloadAvailable = refreshed.subtitleDownloadAvailable
+                trickplayAvailable = refreshed.trickplayAvailable
+                skipIntroAvailable = refreshed.skipIntroAvailable
+                endCreditsAvailable = refreshed.endCreditsAvailable
                 if (refreshed.title.isNotBlank()) playbackTitle = refreshed.title
                 subtitleAutoSelectionAttempted = false
                 Log.i(
                     PLAYBACK_LOG_TAG,
                     "event=subtitle_configs item=${refreshed.itemId} count=${refreshed.subtitles.size} source=refresh",
                 )
-                playback.setMediaItem(mediaItem(refreshed.url, refreshed.subtitles), positionMs)
-                playback.playWhenReady = true
-                playback.prepare()
+                startMedia(refreshed.url, refreshed.subtitles, positionMs, playWhenReady = true)
             }.onFailure { refreshError ->
+                if (refreshError is kotlinx.coroutines.CancellationException) throw refreshError
+                if (generation != retryGeneration || itemId != id || isFinishing || isDestroyed) {
+                    return@onFailure
+                }
                 Log.e(
                     PLAYBACK_LOG_TAG,
                     "event=stream_refresh_failed item=$id attempt=$automaticRetryAttempt",
@@ -2363,18 +2480,22 @@ class PlayerActivity : ComponentActivity() {
      * here; the banner only ever appears when there is something real to show.
      */
     private fun prefetchNextEpisode() {
+        nextEpisodeLookupJob?.cancel()
         nextEpisode = null
         val id = itemId?.takeIf { it.isNotBlank() } ?: return
-        lifecycleScope.launch {
+        nextEpisodeLookupJob = lifecycleScope.launch {
             val enabled = ServiceLocator.repository.settingsFlow.first().autoPlayNextEpisode
-            if (!enabled) return@launch
+            val resolved = if (enabled) {
             // A next episode with no stream behind it is not a next episode. Kept as one
             // it would put up a banner and a countdown promising something that cannot be
             // played, and then — because the countdown runs itself out — swap it in
             // automatically and fail, with a viewer who pressed nothing having their
             // programme replaced by an error.
-            val resolved = ServiceLocator.repository.nextEpisode(id, seriesId = null)
-                ?.takeIf { it.url.isNotBlank() }
+                ServiceLocator.repository.nextEpisode(id, seriesId = null)
+                    ?.takeIf { it.url.isNotBlank() }
+            } else {
+                null
+            }
             resolved?.imageUrl?.let { imageUrl ->
                 imageLoader.enqueue(
                     ImageRequest.Builder(this@PlayerActivity)
@@ -2386,9 +2507,14 @@ class PlayerActivity : ComponentActivity() {
             // Playback may have moved on to another episode while this was in flight.
             if (itemId == id) {
                 nextEpisode = resolved
-                // Extremely short episodes can end before the background lookup returns.
-                if (player?.playbackState == Player.STATE_ENDED && !nextUpDismissed) {
-                    resolved?.let(::playNext)
+                // Extremely short episodes and hostile latency can reach Ended before the
+                // lookup. The ended frame waits for this answer rather than leaving Home.
+                if (player?.playbackState == Player.STATE_ENDED) {
+                    when (playbackCompletionAction(resolved != null, nextUpDismissed)) {
+                        PlaybackCompletionAction.PLAY_NEXT -> resolved?.let(::playNext)
+                        PlaybackCompletionAction.RETURN_HOME -> returnHomeAfterCompletion()
+                        PlaybackCompletionAction.WAIT_FOR_NEXT -> Unit
+                    }
                 }
             }
         }
@@ -2781,22 +2907,26 @@ class PlayerActivity : ComponentActivity() {
     }
 
     private fun handlePlaybackEnded() {
-        when (playbackCompletionAction(nextEpisode != null, nextUpDismissed)) {
+        when (playbackCompletionAction(
+            hasNextEpisode = nextEpisode != null,
+            nextUpDismissed = nextUpDismissed,
+            nextLookupInFlight = nextEpisodeLookupJob?.isActive == true,
+        )) {
             PlaybackCompletionAction.PLAY_NEXT -> nextEpisode?.let(::playNext)
             PlaybackCompletionAction.RETURN_HOME -> returnHomeAfterCompletion()
+            PlaybackCompletionAction.WAIT_FOR_NEXT -> showPlaybackLoading(
+                title = "Finding the next episode…",
+                hint = "Playback will continue as soon as the server answers.",
+            )
         }
     }
 
-    /**
-     * A terminal item should never leave a still frame or black player surface behind.
-     * Starting a fresh Home task also covers playback launched from the screensaver and
-     * deliberately clears any detail/search overlay that was behind PlayerActivity.
-     */
+    /** A terminal item returns to the exact screen that launched playback. */
     private fun returnHomeAfterCompletion() {
         if (returningHomeAfterCompletion || isFinishing || isDestroyed) return
         returningHomeAfterCompletion = true
         nextUpJob?.cancel()
-        progressJob?.cancel()
+        stopProgressUploading()
         hideNextUp()
 
         val playback = player
@@ -2809,13 +2939,6 @@ class PlayerActivity : ComponentActivity() {
                 playback?.currentPosition ?: 0L,
             )
         }
-        startActivity(
-            Intent(this, MainActivity::class.java).addFlags(
-                Intent.FLAG_ACTIVITY_NEW_TASK or
-                    Intent.FLAG_ACTIVITY_CLEAR_TASK or
-                    Intent.FLAG_ACTIVITY_CLEAR_TOP,
-            ),
-        )
         finish()
     }
 
@@ -2828,7 +2951,19 @@ class PlayerActivity : ComponentActivity() {
         if (advancing || returningHomeAfterCompletion) return
         advancing = true
         nextUpJob?.cancel()
-        progressJob?.cancel()
+        nextEpisodeLookupJob?.cancel()
+        nextEpisodeLookupJob = null
+        retryGeneration += 1
+        retryJob?.cancel()
+        subtitleStreamGeneration += 1
+        subtitleSearchJob?.cancel()
+        encodedSubtitleJob?.cancel()
+        subtitleRequestInFlight = false
+        subtitleCandidates = emptyList()
+        subtitleDownloadStatus = ""
+        subtitleDownloadExpanded = false
+        subtitleOverlay?.visibility = View.GONE
+        stopProgressUploading()
         hideNextUp()
 
         val playback = player
@@ -2849,6 +2984,11 @@ class PlayerActivity : ComponentActivity() {
         availableSubtitles = next.subtitles
         subtitlePreference = next.subtitlesEnabled
         serverSubtitleId = next.selectedSubtitleId
+        subtitleDownloadAvailable = next.subtitleDownloadAvailable
+        trickplayAvailable = next.trickplayAvailable
+        skipIntroAvailable = next.skipIntroAvailable
+        endCreditsAvailable = next.endCreditsAvailable
+        encodedSubtitleId = null
         stopReported = false
         playbackStarted = false
         playbackIdentityShown = false
@@ -2883,8 +3023,26 @@ class PlayerActivity : ComponentActivity() {
         // The cast reloads with the rest of the new episode's session, once it is playing.
 
         playbackTitle = nextTitle(next)
+        logoUrl = next.logoUrl
+        pausePosterUrl = next.imageUrl
+        pauseOverview = next.overview
+        prerollEpisodeCode = next.episodeCode.orEmpty()
+        prerollRuntimeMs = next.runtimeMs.coerceAtLeast(0L)
         bindTitleArtwork(title = playbackTitle, logoUrl = logoUrl)
         setUpPlaybackIdentity(title = playbackTitle)
+        pauseOverlay?.findViewById<TextView>(R.id.player_pause_title)?.text = playbackTitle
+        pauseOverlay?.findViewById<TextView>(R.id.player_pause_overview)?.text =
+            pauseOverview.ifBlank { getString(R.string.player_pause_overview_fallback) }
+        pauseOverlay?.findViewById<ImageView>(R.id.player_pause_poster)?.apply {
+            val poster = pausePosterUrl
+            if (poster.isNullOrBlank()) {
+                visibility = View.GONE
+                setImageDrawable(null)
+            } else {
+                visibility = View.VISIBLE
+                load(poster) { crossfade(true) }
+            }
+        }
         hidePlaybackError()
         showPlaybackLoading()
         if (playback != null) {
@@ -3479,6 +3637,7 @@ class PlayerActivity : ComponentActivity() {
     private fun searchForSubtitles() {
         if (subtitleRequestInFlight) return
         val id = itemId?.takeIf(String::isNotBlank) ?: return
+        val generation = ++subtitleStreamGeneration
         subtitleCandidates = emptyList()
         subtitleDownloadStatus = getString(R.string.player_subtitle_searching)
         subtitleDownloadExpanded = true
@@ -3493,6 +3652,7 @@ class PlayerActivity : ComponentActivity() {
                     itemId = id,
                     language = ServiceLocator.settings.current?.subtitleLanguage,
                 )
+                if (generation != subtitleStreamGeneration || itemId != id) return@launch
                 subtitleCandidates = found.results
                 subtitleDownloadStatus = if (found.results.isEmpty()) {
                     found.message.ifBlank { getString(R.string.player_subtitle_search_empty) }
@@ -3503,8 +3663,9 @@ class PlayerActivity : ComponentActivity() {
             } finally {
                 // In a finally so a cancelled search — Back out of the section, or the
                 // activity going away — cannot leave every row permanently unpressable.
-                subtitleRequestInFlight = false
+                if (generation == subtitleStreamGeneration) subtitleRequestInFlight = false
             }
+            if (generation != subtitleStreamGeneration || itemId != id) return@launch
             redrawSubtitleOverlay(focusDownload = if (subtitleCandidates.isEmpty()) 0 else 1)
         }
     }
@@ -3521,6 +3682,7 @@ class PlayerActivity : ComponentActivity() {
         if (subtitleRequestInFlight) return
         val playback = player ?: return
         val id = itemId?.takeIf(String::isNotBlank) ?: return
+        val generation = ++subtitleStreamGeneration
         subtitleDownloadStatus = getString(
             R.string.player_subtitle_downloading,
             candidate.languageLabel.ifBlank { candidate.language },
@@ -3528,20 +3690,29 @@ class PlayerActivity : ComponentActivity() {
         subtitleRequestInFlight = true
         subtitleSearchJob = lifecycleScope.launch {
             redrawSubtitleOverlay()
-            val result = try {
-                ServiceLocator.repository.downloadSubtitle(id, candidate)
-            } finally {
-                subtitleRequestInFlight = false
-            }
+            val result = ServiceLocator.repository.downloadSubtitle(id, candidate)
+            if (generation != subtitleStreamGeneration || itemId != id) return@launch
+            subtitleRequestInFlight = false
             if (result == null) {
                 subtitleDownloadStatus = getString(R.string.player_subtitle_download_failed)
                 redrawSubtitleOverlay(focusDownload = 0)
                 return@launch
             }
             val position = playback.currentPosition.coerceAtLeast(0L)
+            val resumePlaying = playback.playWhenReady
+            if (result.url.isBlank()) {
+                subtitleDownloadStatus = getString(R.string.player_subtitle_download_failed)
+                redrawSubtitleOverlay(focusDownload = 0)
+                return@launch
+            }
+            adoptReplacementSession(
+                newItemId = id,
+                newMediaSourceId = result.mediaSourceId.ifBlank { mediaSourceId },
+                newPlaySessionId = result.playSessionId.ifBlank { playSessionId },
+                newPlayMethod = playMethod,
+                positionMs = position,
+            )
             availableSubtitles = result.subtitles
-            mediaSourceId = result.mediaSourceId.ifBlank { mediaSourceId }
-            playSessionId = result.playSessionId.ifBlank { playSessionId }
             serverSubtitleId = result.selectedSubtitleId
             subtitlePreference = true
             encodedSubtitleId = null
@@ -3551,9 +3722,7 @@ class PlayerActivity : ComponentActivity() {
             subtitleAutoSelectionAttempted = false
             rememberSubtitleChoice(enabled = true, language = candidate.language)
             pendingSubtitleConfirmation = candidate.languageLabel.ifBlank { candidate.language }
-            playback.setMediaItem(mediaItem(result.url, result.subtitles), position)
-            playback.playWhenReady = true
-            playback.prepare()
+            startMedia(result.url, result.subtitles, position, playWhenReady = resumePlaying)
             Log.i(PLAYBACK_LOG_TAG, "event=subtitle_downloaded item=$id language=${candidate.language}")
             subtitleCandidates = emptyList()
             subtitleDownloadStatus = result.message
@@ -3570,6 +3739,7 @@ class PlayerActivity : ComponentActivity() {
      * back an hour later presses a row that quietly fails. A search is one press away.
      */
     private fun collapseSubtitleDownloads() {
+        subtitleStreamGeneration += 1
         subtitleSearchJob?.cancel()
         subtitleRequestInFlight = false
         subtitleDownloadExpanded = false
@@ -3655,10 +3825,14 @@ class PlayerActivity : ComponentActivity() {
         val id = itemId?.takeIf(String::isNotBlank) ?: return
         val index = subtitle.id.toIntOrNull() ?: return
         val position = playback.currentPosition.coerceAtLeast(0L)
+        val resumePlaying = playback.playWhenReady
+        val generation = ++subtitleStreamGeneration
+        encodedSubtitleJob?.cancel()
         dismissSubtitleOverlayAfterSelection()
         reportProgress(position, !playback.isPlaying, "SubtitleTrackChange")
+        playback.pause()
         showPlaybackLoading(getString(R.string.playback_loading), "Preparing burned-in subtitles…")
-        lifecycleScope.launch {
+        encodedSubtitleJob = lifecycleScope.launch {
             runCatching {
                 ServiceLocator.repository.selectEncodedSubtitle(
                     playbackSession(id),
@@ -3667,26 +3841,41 @@ class PlayerActivity : ComponentActivity() {
                     position,
                 )
             }.onSuccess { selected ->
-                mediaSourceId = selected.mediaSourceId
-                playSessionId = selected.playSessionId
-                playMethod = selected.playMethod
+                if (generation != subtitleStreamGeneration || itemId != id || isFinishing || isDestroyed) {
+                    return@onSuccess
+                }
+                if (selected.url.isBlank()) {
+                    hidePlaybackLoading()
+                    if (resumePlaying) playback.play()
+                    Toast.makeText(this@PlayerActivity, "Couldn’t enable subtitles", Toast.LENGTH_SHORT).show()
+                    return@onSuccess
+                }
+                adoptReplacementSession(
+                    newItemId = selected.itemId,
+                    newMediaSourceId = selected.mediaSourceId,
+                    newPlaySessionId = selected.playSessionId,
+                    newPlayMethod = selected.playMethod,
+                    positionMs = position,
+                )
                 availableSubtitles = selected.subtitles
                 encodedSubtitleId = subtitle.id
                 subtitlePreference = true
+                subtitleDownloadAvailable = selected.subtitleDownloadAvailable
+                trickplayAvailable = selected.trickplayAvailable
+                skipIntroAvailable = selected.skipIntroAvailable
+                endCreditsAvailable = selected.endCreditsAvailable
                 rememberSubtitleChoice(enabled = true, language = subtitle.language)
                 subtitleAutoSelectionAttempted = true
                 pendingSubtitleConfirmation = subtitleDisplayLabel(subtitle)
-                playback.setMediaItem(mediaItem(selected.url, selected.subtitles), position)
-                playback.playWhenReady = true
-                playback.prepare()
-            }.onFailure {
-                showPlaybackError(
-                    PlaybackFailure(
-                        title = "Couldn’t enable subtitles",
-                        detail = "The Emby server could not prepare this image subtitle track.",
-                        canAutoRetry = false,
-                    ),
-                )
+                startMedia(selected.url, selected.subtitles, position, playWhenReady = resumePlaying)
+            }.onFailure { error ->
+                if (error is kotlinx.coroutines.CancellationException) throw error
+                if (generation != subtitleStreamGeneration || itemId != id || isFinishing || isDestroyed) {
+                    return@onFailure
+                }
+                hidePlaybackLoading()
+                if (resumePlaying) playback.play()
+                Toast.makeText(this@PlayerActivity, "Couldn’t enable subtitles", Toast.LENGTH_SHORT).show()
             }
         }
     }
@@ -3762,6 +3951,44 @@ class PlayerActivity : ComponentActivity() {
         return if (traits.isEmpty()) name else "$name · ${traits.joinToString(" · ")}"
     }
 
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        // PlayerActivity is singleTask. A defensive second launch must replace the current
+        // programme deliberately rather than being delivered to an activity that ignores it.
+        relaunchingForNewIntent = true
+        setIntent(intent)
+        recreate()
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        player?.takeUnless { relaunchingForNewIntent }?.let { playback ->
+            outState.putLong(STATE_POSITION_MS, playback.currentPosition.coerceAtLeast(0L))
+            outState.putBoolean(STATE_PLAY_WHEN_READY, playback.playWhenReady)
+            playback.currentMediaItem?.localConfiguration?.uri?.toString()?.takeIf(String::isNotBlank)
+                ?.let { outState.putString(STATE_URL, it) }
+            itemId?.let { outState.putString(STATE_ITEM_ID, it) }
+            outState.putString(STATE_MEDIA_SOURCE_ID, mediaSourceId)
+            outState.putString(STATE_PLAY_SESSION_ID, playSessionId)
+            outState.putString(STATE_PLAY_METHOD, playMethod)
+            if (availableSubtitles.isNotEmpty()) {
+                outState.putString(STATE_SUBTITLES, playerJson.encodeToString(availableSubtitles))
+            }
+            outState.putBoolean(STATE_SUBTITLES_ENABLED, subtitlePreference == true)
+            outState.putString(STATE_SELECTED_SUBTITLE_ID, serverSubtitleId)
+            outState.putBoolean(STATE_SUBTITLE_DOWNLOAD, subtitleDownloadAvailable)
+            outState.putBoolean(STATE_TRICKPLAY, trickplayAvailable)
+            outState.putBoolean(STATE_SKIP_INTRO, skipIntroAvailable)
+            outState.putBoolean(STATE_END_CREDITS, endCreditsAvailable)
+            outState.putString(STATE_TITLE, playbackTitle)
+            outState.putString(STATE_LOGO_URL, logoUrl)
+            outState.putString(STATE_OVERVIEW, pauseOverview)
+            outState.putString(STATE_POSTER_URL, pausePosterUrl)
+            outState.putString(STATE_EPISODE_CODE, prerollEpisodeCode)
+            outState.putLong(STATE_RUNTIME_MS, prerollRuntimeMs)
+        }
+        super.onSaveInstanceState(outState)
+    }
+
     override fun onStart() {
         super.onStart()
         if (prerollActive) {
@@ -3770,10 +3997,29 @@ class PlayerActivity : ComponentActivity() {
             localPrerollPlayer?.play() ?: run { player?.playWhenReady = true }
         }
         beginContentWhenReady()
+        pendingRequest?.takeIf {
+            player?.currentMediaItem == null && pendingResolveJob?.isActive != true
+        }?.let { request ->
+            resolvePendingStream(request, playWhenReady = true)
+        }
+        if (retryAfterResume) {
+            retryAfterResume = false
+            retryPlayback(refreshSource = true)
+        }
         if (stoppedInBackground && playbackStarted) {
             stoppedInBackground = false
             stopReported = false
-            player?.let { reportStarted(it.currentPosition) }
+            player?.let { playback ->
+                itemId?.takeIf(String::isNotBlank)?.let { id ->
+                    val session = playbackSession(id)
+                    lifecycleScope.launch {
+                        runCatching { PlaybackStopWorker.cancel(this@PlayerActivity, session) }
+                        if (itemId != id || isFinishing || isDestroyed) return@launch
+                        reportStarted(playback.currentPosition)
+                        startProgressReporting()
+                    }
+                }
+            }
         }
     }
 
@@ -3781,9 +4027,22 @@ class PlayerActivity : ComponentActivity() {
         // Land any pending skip first, or the position reported to Emby — and so where
         // this title resumes from — is the one the viewer had already skipped past.
         commitSeek()
+        pendingResolveGeneration += 1
+        pendingResolveJob?.cancel()
+        if (retryJob?.isActive == true) {
+            retryAfterResume = true
+            retryGeneration += 1
+            retryJob?.cancel()
+        }
+        subtitleStreamGeneration += 1
+        encodedSubtitleJob?.cancel()
+        subtitleSearchJob?.cancel()
+        subtitleRequestInFlight = false
         player?.let {
             if (playbackStarted && !stopReported) {
-                reportProgress(it.currentPosition, isPaused = true, eventName = "Pause")
+                // The durable stop carries this same position. Cancel advisory progress
+                // first so a high-latency older report cannot arrive after it.
+                stopProgressUploading()
                 stopReported = true
                 stoppedInBackground = true
                 itemId?.takeIf(String::isNotBlank)?.let { id ->
@@ -3800,7 +4059,7 @@ class PlayerActivity : ComponentActivity() {
         // A launch that never reached a frame still has to close its spans.
         endFirstFrameTrace()
         endLaunchTrace()
-        progressJob?.cancel()
+        stopProgressUploading()
         pendingResolveJob?.cancel()
         prerollTimerJob?.cancel()
         prerollScheduleJob?.cancel()
@@ -3816,7 +4075,9 @@ class PlayerActivity : ComponentActivity() {
         castJob?.cancel()
         castPersonJob?.cancel()
         subtitleSearchJob?.cancel()
+        encodedSubtitleJob?.cancel()
         nextUpJob?.cancel()
+        nextEpisodeLookupJob?.cancel()
         creditsSpeedJob?.cancel()
         creditsView?.animate()?.cancel()
         retryJob?.cancel()
@@ -3848,7 +4109,8 @@ class PlayerActivity : ComponentActivity() {
 
     private fun reportStarted(positionMs: Long) {
         val id = itemId?.takeIf { it.isNotBlank() } ?: return
-        lifecycleScope.launch {
+        playbackStartReportJob?.cancel()
+        playbackStartReportJob = lifecycleScope.launch {
             runCatching {
                 ServiceLocator.repository.reportPlaybackStarted(playbackSession(id), positionMs)
             }
@@ -3857,31 +4119,96 @@ class PlayerActivity : ComponentActivity() {
 
     private fun reportProgress(positionMs: Long, isPaused: Boolean, eventName: String) {
         val id = itemId?.takeIf { it.isNotBlank() } ?: return
-        lifecycleScope.launch {
-            val durationMs = player?.duration?.takeIf { it != C.TIME_UNSET && it > 0L } ?: 0L
-            val evaluatesAutoFollow = !autoFollowEvaluated &&
-                durationMs > 0L && positionMs >= (durationMs + 1L) / 2L
-            runCatching {
-                ServiceLocator.repository.reportPlaybackProgress(
-                    playbackSession(id),
-                    positionMs,
-                    isPaused,
-                    eventName,
-                    durationMs.takeUnless { autoFollowEvaluated } ?: 0L,
-                )
-            }.onSuccess { showTitle ->
-                if (evaluatesAutoFollow) autoFollowEvaluated = true
-                showTitle?.let {
-                    Toast.makeText(
-                        this@PlayerActivity,
-                        "$it was added to My Shows",
-                        Toast.LENGTH_LONG,
-                    ).show()
+        val durationMs = player?.duration?.takeIf { it != C.TIME_UNSET && it > 0L } ?: 0L
+        progressReports.trySend(
+            PendingProgressReport(id, positionMs, isPaused, eventName, durationMs),
+        )
+        if (progressUploadJob?.isActive == true) return
+        progressUploadJob = lifecycleScope.launch {
+            // A hostilely slow start response must still precede the first progress event.
+            playbackStartReportJob?.join()
+            for (report in progressReports) {
+                // One report at a time, with the channel retaining only the newest report
+                // that arrived during the wait. A slow earlier position can therefore
+                // never land at Emby after a newer one and move the saved playhead back.
+                if (itemId != report.itemId) continue
+                val evaluatesAutoFollow = !autoFollowEvaluated &&
+                    report.durationMs > 0L &&
+                    report.positionMs >= (report.durationMs + 1L) / 2L
+                runCatching {
+                    ServiceLocator.repository.reportPlaybackProgress(
+                        playbackSession(report.itemId),
+                        report.positionMs,
+                        report.isPaused,
+                        report.eventName,
+                        report.durationMs.takeUnless { autoFollowEvaluated } ?: 0L,
+                    )
+                }.onSuccess { showTitle ->
+                    if (evaluatesAutoFollow) autoFollowEvaluated = true
+                    showTitle?.let {
+                        Toast.makeText(
+                            this@PlayerActivity,
+                            "$it was added to My Shows",
+                            Toast.LENGTH_LONG,
+                        ).show()
+                    }
                 }
             }
         }
     }
 
+    /** Stops advisory uploads before a durable final position is queued. */
+    private fun stopProgressUploading() {
+        progressJob?.cancel()
+        progressJob = null
+        playbackStartReportJob?.cancel()
+        playbackStartReportJob = null
+        progressUploadJob?.cancel()
+        progressUploadJob = null
+        while (progressReports.tryReceive().isSuccess) {
+            // Discard reports for the session that is stopping.
+        }
+    }
+
+    private data class PendingProgressReport(
+        val itemId: String,
+        val positionMs: Long,
+        val isPaused: Boolean,
+        val eventName: String,
+        val durationMs: Long,
+    )
+
+    /** Closes the old Emby session before a refreshed media source takes its place. */
+    private fun adoptReplacementSession(
+        newItemId: String,
+        newMediaSourceId: String,
+        newPlaySessionId: String,
+        newPlayMethod: String,
+        positionMs: Long,
+    ) {
+        val oldItemId = itemId
+        val oldSession = oldItemId?.takeIf(String::isNotBlank)?.let(::playbackSession)
+        val changed = playbackSessionChanged(
+            oldItemId = oldItemId,
+            oldMediaSourceId = mediaSourceId,
+            oldPlaySessionId = playSessionId,
+            newItemId = newItemId,
+            newMediaSourceId = newMediaSourceId,
+            newPlaySessionId = newPlaySessionId,
+        )
+        if (changed && playbackStarted && oldSession != null) {
+            stopProgressUploading()
+            PlaybackStopWorker.enqueue(this, oldSession, positionMs)
+            playbackStarted = false
+            stopReported = false
+            stoppedInBackground = false
+        }
+        itemId = newItemId
+        mediaSourceId = newMediaSourceId.ifBlank { newItemId }
+        playSessionId = newPlaySessionId
+        playMethod = newPlayMethod.ifBlank { "DirectPlay" }
+    }
+
     private fun playbackSession(id: String) = PlaybackSession(
         itemId = id,
         mediaSourceId = mediaSourceId.ifBlank { id },
@@ -3958,6 +4285,26 @@ class PlayerActivity : ComponentActivity() {
         private const val EXTRA_PLAY_SESSION_ID = "extra_play_session_id"
         private const val EXTRA_PLAY_METHOD = "extra_play_method"
         private const val EXTRA_PLAYBACK_REQUEST = "extra_playback_request"
+        private const val STATE_POSITION_MS = "state_position_ms"
+        private const val STATE_PLAY_WHEN_READY = "state_play_when_ready"
+        private const val STATE_URL = "state_url"
+        private const val STATE_ITEM_ID = "state_item_id"
+        private const val STATE_MEDIA_SOURCE_ID = "state_media_source_id"
+        private const val STATE_PLAY_SESSION_ID = "state_play_session_id"
+        private const val STATE_PLAY_METHOD = "state_play_method"
+        private const val STATE_SUBTITLES = "state_subtitles"
+        private const val STATE_SUBTITLES_ENABLED = "state_subtitles_enabled"
+        private const val STATE_SELECTED_SUBTITLE_ID = "state_selected_subtitle_id"
+        private const val STATE_SUBTITLE_DOWNLOAD = "state_subtitle_download"
+        private const val STATE_TRICKPLAY = "state_trickplay"
+        private const val STATE_SKIP_INTRO = "state_skip_intro"
+        private const val STATE_END_CREDITS = "state_end_credits"
+        private const val STATE_TITLE = "state_title"
+        private const val STATE_LOGO_URL = "state_logo_url"
+        private const val STATE_OVERVIEW = "state_overview"
+        private const val STATE_POSTER_URL = "state_poster_url"
+        private const val STATE_EPISODE_CODE = "state_episode_code"
+        private const val STATE_RUNTIME_MS = "state_runtime_ms"
         private const val PLAYER_PREFERENCES = "player_preferences"
         private const val SUBTITLE_SIZE_KEY = "subtitle_size"
         private const val PICTURE_MODE_KEY = "picture_mode"
@@ -4254,19 +4601,38 @@ internal fun shouldShowPreroll(resumePositionMs: Long, enabled: Boolean = true):
 
 internal enum class PlaybackCompletionAction {
     PLAY_NEXT,
+    WAIT_FOR_NEXT,
     RETURN_HOME,
 }
 
 internal fun playbackCompletionAction(
     hasNextEpisode: Boolean,
     nextUpDismissed: Boolean,
+    nextLookupInFlight: Boolean = false,
 ): PlaybackCompletionAction =
     if (hasNextEpisode && !nextUpDismissed) {
         PlaybackCompletionAction.PLAY_NEXT
+    } else if (!nextUpDismissed && nextLookupInFlight) {
+        PlaybackCompletionAction.WAIT_FOR_NEXT
     } else {
         PlaybackCompletionAction.RETURN_HOME
     }
 
+internal fun playbackSessionChanged(
+    oldItemId: String?,
+    oldMediaSourceId: String,
+    oldPlaySessionId: String,
+    newItemId: String,
+    newMediaSourceId: String,
+    newPlaySessionId: String,
+): Boolean = oldItemId != newItemId || if (
+    oldPlaySessionId.isNotBlank() || newPlaySessionId.isNotBlank()
+) {
+    oldPlaySessionId != newPlaySessionId
+} else {
+    oldMediaSourceId != newMediaSourceId
+}
+
 internal fun shouldZoomVideo(
     modeKey: String,
     width: Int,

app/src/main/java/com/ponzischeme89/memby/ui/player/PrerollPreloader.kt

@@ -98,10 +98,8 @@ internal object PrerollPreloader {
         player.normalised()
         cachedPlayer?.release()
         cachedPlayer = player
-        // Stopping the player leaves it idle, so the next borrower would pay for the local
-        // resource read itself. Re-arm the idle prepare here rather than depending on the
-        // caller to remember: the launcher is not the only thing that returns one now.
-        scheduleAtMainQueueIdle()
+        // Keep it idle while the programme owns the decoder. Home calls [start] when it is
+        // visible again, which prepares this cached instance without competing with video.
     }
 
     /** Drops a failed or otherwise unusable instance; the next Home/start call replaces it. */

app/src/main/java/com/ponzischeme89/memby/ui/screensaver/ScreensaverContent.kt

@@ -182,6 +182,7 @@ private fun Slideshow(
     var settingsOpen by remember { mutableStateOf(false) }
     var loading by remember { mutableStateOf(true) }
     var loadingMore by remember { mutableStateOf(false) }
+    var playbackLaunching by remember { mutableStateOf(false) }
     var loadError by remember { mutableStateOf<String?>(null) }
     var toast by remember(startupMessage) { mutableStateOf(startupMessage) }
     var reloadKey by remember { mutableIntStateOf(0) }
@@ -247,8 +248,11 @@ private fun Slideshow(
         loadingMore = true
         toast = "Finding more from your library…"
         scope.launch {
+            var prefetchError: Throwable? = null
             val more = visibleWithWatchedPreference(
-                runCatching { repo.getScreensaverItems() }.getOrDefault(emptyList()),
+                runCatching { repo.getScreensaverItems() }
+                    .onFailure { prefetchError = it }
+                    .getOrDefault(emptyList()),
                 hideWatchedMovies,
             )
             if (more.isNotEmpty()) {
@@ -270,7 +274,7 @@ private fun Slideshow(
                     "Refreshed the queue with a new order"
                 }
             } else {
-                toast = "No additional titles found"
+                toast = prefetchError?.let(::friendlyEmbyError) ?: "No additional titles found"
             }
             loadingMore = false
         }
@@ -367,20 +371,45 @@ private fun Slideshow(
     }
 
     fun playTrailer(item: BaseItem?) {
+        if (playbackLaunching) return
         val target = item ?: return
+        playbackLaunching = true
         toast = "Finding trailer…"
         scope.launch {
             runCatching { repo.getLocalTrailer(target.id) }
                 .onSuccess { trailer ->
                     if (trailer == null) {
                         toast = "No trailer is available for ${target.name}."
+                        playbackLaunching = false
                     } else {
                         runCatching { repo.resolvePlayable(trailer) }
-                            .onSuccess { onPlay(it.url, "${target.name} trailer") }
-                            .onFailure { toast = friendlyEmbyError(it) }
+                            .onSuccess { playable ->
+                                if (playable.url.isBlank()) {
+                                    toast = "The trailer is unavailable right now."
+                                    playbackLaunching = false
+                                } else if (runCatching {
+                                        onPlay(playable.url, "${target.name} trailer")
+                                    }.isFailure
+                                ) {
+                                    toast = "Couldn’t start the trailer."
+                                    playbackLaunching = false
+                                } else {
+                                    // Keep rapid Select/media-key repeats gated while the
+                                    // activity hand-off occurs, then re-arm on return.
+                                    delay(1_000L)
+                                    playbackLaunching = false
+                                }
+                            }
+                            .onFailure {
+                                toast = friendlyEmbyError(it)
+                                playbackLaunching = false
+                            }
                     }
                 }
-                .onFailure { toast = friendlyEmbyError(it) }
+                .onFailure {
+                    toast = friendlyEmbyError(it)
+                    playbackLaunching = false
+                }
         }
     }
 

app/src/main/java/com/ponzischeme89/memby/ui/search/SearchScreen.kt

@@ -99,6 +99,7 @@ import com.ponzischeme89.memby.ServiceLocator
 import com.ponzischeme89.memby.data.model.BaseItem
 import com.ponzischeme89.memby.data.model.GatewayRequestCandidate
 import com.ponzischeme89.memby.ui.FocusScaleContainer
+import com.ponzischeme89.memby.ui.MembyChoiceChip
 import com.ponzischeme89.memby.ui.PosterGridCard
 import com.ponzischeme89.memby.ui.theme.MembyAccent
 import com.ponzischeme89.memby.ui.theme.MembyAccentInk
@@ -786,6 +787,8 @@ private fun ResultsPane(
                     // listener running for nothing.
                     paging = state.genre != null && (state.canLoadMore || state.isLoadingMore),
                     loadingMore = state.isLoadingMore,
+                    pagingErrorMessage = state.pagingErrorMessage,
+                    onRetryPage = onRetry,
                     onLoadMore = onLoadMore,
                 )
             }
@@ -863,6 +866,8 @@ private fun ResultsGrid(
     onItemSelected: (BaseItem) -> Unit,
     paging: Boolean = false,
     loadingMore: Boolean = false,
+    pagingErrorMessage: String? = null,
+    onRetryPage: () -> Unit = {},
     onLoadMore: () -> Unit = {},
 ) {
     val context = LocalContext.current
@@ -951,6 +956,19 @@ private fun ResultsGrid(
                 }
             }
         }
+        if (pagingErrorMessage != null) {
+            item(span = { GridItemSpan(maxLineSpan) }, contentType = "search-paging-error") {
+                Row(
+                    modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp),
+                    horizontalArrangement = Arrangement.Center,
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Text("Couldn’t load more titles.", color = Muted, fontSize = 13.sp)
+                    Spacer(Modifier.width(10.dp))
+                    MembyChoiceChip(label = "Try again", selected = false, onClick = onRetryPage)
+                }
+            }
+        }
     }
 }
 

app/src/main/java/com/ponzischeme89/memby/ui/search/SearchViewModel.kt

@@ -64,6 +64,7 @@ data class SearchUiState(
     /** True once a query has run to completion, so "no matches" is distinguishable from "not yet". */
     val hasSearched: Boolean = false,
     val errorMessage: String? = null,
+    val pagingErrorMessage: String? = null,
     val requestCandidates: List<GatewayRequestCandidate> = emptyList(),
     val requestLookupLoading: Boolean = false,
     val requestingCandidateKey: String? = null,
@@ -156,6 +157,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                 requestLookupLoading = false,
                 requestMessage = null,
                 requestMessageIsError = false,
+                pagingErrorMessage = null,
             )
         }
         queryFlow.value = query
@@ -174,6 +176,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                 query = "", results = emptyList(), genreOffset = 0,
                 isLoading = false, hasSearched = false,
                 errorMessage = null, requestCandidates = emptyList(),
+                pagingErrorMessage = null,
                 requestLookupLoading = false, requestMessage = null,
                 requestMessageIsError = false, genre = null,
                 isLoadingMore = false, canLoadMore = false,
@@ -196,6 +199,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                 isLoading = true,
                 hasSearched = false, errorMessage = null, isLoadingMore = false,
                 canLoadMore = false, requestCandidates = emptyList(),
+                pagingErrorMessage = null,
                 requestLookupLoading = false, requestMessage = null,
                 requestMessageIsError = false,
             )
@@ -214,6 +218,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                 genre = null, results = emptyList(), genreOffset = 0,
                 isLoading = false, hasSearched = false,
                 errorMessage = null, isLoadingMore = false, canLoadMore = false,
+                pagingErrorMessage = null,
             )
         }
     }
@@ -227,7 +232,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
         val current = state.value
         val genre = current.genre ?: return
         if (!current.canLoadMore || current.isLoadingMore || current.isLoading) return
-        _state.update { it.copy(isLoadingMore = true) }
+        _state.update { it.copy(isLoadingMore = true, pagingErrorMessage = null) }
         genrePageJob = viewModelScope.launch { loadGenrePage(genre, offset = current.genreOffset) }
     }
 
@@ -236,7 +241,14 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
         val current = state.value
         current.genre?.let { genre ->
             genrePageJob?.cancel()
-            _state.update { it.copy(isLoading = true, errorMessage = null) }
+            _state.update {
+                it.copy(
+                    isLoading = it.results.isEmpty(),
+                    isLoadingMore = it.results.isNotEmpty(),
+                    errorMessage = null,
+                    pagingErrorMessage = null,
+                )
+            }
             genrePageJob = viewModelScope.launch {
                 loadGenrePage(genre, offset = current.genreOffset)
             }
@@ -251,6 +263,8 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
     fun request(candidate: GatewayRequestCandidate) {
         if (candidate.alreadyAdded || state.value.requestingCandidateKey != null) return
         val candidateKey = "${candidate.mediaType}:${candidate.foreignId}"
+        val queryAtRequest = state.value.query.trim()
+        val genreAtRequest = state.value.genre
         _state.update {
             it.copy(requestingCandidateKey = candidateKey, requestMessage = null, requestMessageIsError = false)
         }
@@ -258,24 +272,32 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
             runCatching { repository.requestMedia(candidate) }
                 .onSuccess { title ->
                     _state.update {
+                        if (it.requestingCandidateKey != candidateKey) return@update it
+                        val stillShowingRequest = it.query.trim() == queryAtRequest &&
+                            it.genre == genreAtRequest
                         it.copy(
                             requestingCandidateKey = null,
-                            requestCandidates = it.requestCandidates.map { option ->
+                            requestCandidates = if (stillShowingRequest) it.requestCandidates.map { option ->
                                 if (option.mediaType == candidate.mediaType &&
                                     option.foreignId == candidate.foreignId
                                 ) option.copy(alreadyAdded = true) else option
-                            },
-                            requestMessage = "${title.ifBlank { candidate.title }} was requested.",
+                            } else it.requestCandidates,
+                            requestMessage = if (stillShowingRequest) {
+                                "${title.ifBlank { candidate.title }} was requested."
+                            } else null,
                             requestMessageIsError = false,
                         )
                     }
                 }
                 .onFailure { error ->
                     _state.update {
+                        if (it.requestingCandidateKey != candidateKey) return@update it
+                        val stillShowingRequest = it.query.trim() == queryAtRequest &&
+                            it.genre == genreAtRequest
                         it.copy(
                             requestingCandidateKey = null,
-                            requestMessage = friendlyEmbyError(error),
-                            requestMessageIsError = true,
+                            requestMessage = if (stillShowingRequest) friendlyEmbyError(error) else null,
+                            requestMessageIsError = stillShowingRequest,
                         )
                     }
                 }
@@ -333,6 +355,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                         isLoadingMore = false,
                         hasSearched = true,
                         errorMessage = null,
+                        pagingErrorMessage = null,
                         canLoadMore = hasMoreGenreItems(
                             loaded = read,
                             total = page.total,
@@ -354,6 +377,7 @@ class SearchViewModel(private val repository: EmbyRepository) : ViewModel() {
                         // there and simply stops: the viewer has plenty on screen, and
                         // replacing it with an error would take away what was working.
                         errorMessage = if (current.results.isEmpty()) friendlyEmbyError(error) else null,
+                        pagingErrorMessage = if (current.results.isNotEmpty()) friendlyEmbyError(error) else null,
                         canLoadMore = false,
                     )
                 }

app/src/test/java/com/ponzischeme89/memby/data/GatewayPayloadTest.kt

@@ -28,6 +28,16 @@ import org.junit.Test
  * side, this fails before a TV ever sees it.
  */
 class GatewayPayloadTest {
+    @Test
+    fun `partially populated items decode without inventing an identity`() {
+        val item = json.decodeFromString<BaseItem>(
+            """{"Name":"Incomplete","Type":"Movie"}""",
+        )
+
+        assertEquals("", item.id)
+        assertEquals("Incomplete", item.name)
+    }
+
     @Test
     fun `decodes server formatted movie rating sources and scales`() {
         val response = json.decodeFromString<GatewayMovieRatings>(
@@ -545,7 +555,11 @@ class GatewayPayloadTest {
               },
               "title": "Westworld – The Bicameral Mind",
               "url": "https://emby.example/Videos/11/stream?static=true",
-              "resumePositionMs": 0
+              "resumePositionMs": 0,
+              "subtitleDownloadAvailable": true,
+              "trickplayAvailable": true,
+              "skipIntroAvailable": true,
+              "endCreditsAvailable": true
             }
             """.trimIndent(),
         )
@@ -556,6 +570,10 @@ class GatewayPayloadTest {
         assertEquals("S2 · E5", next.item.episodeCode)
         assertEquals(0L, next.resumePositionMs)
         assertTrue(next.url.startsWith("https://emby.example/Videos/11/stream"))
+        assertTrue(next.subtitleDownloadAvailable)
+        assertTrue(next.trickplayAvailable)
+        assertTrue(next.skipIntroAvailable)
+        assertTrue(next.endCreditsAvailable)
     }
 
     @Test

app/src/test/java/com/ponzischeme89/memby/ui/ListKeysTest.kt

@@ -40,6 +40,14 @@ class ListKeysTest {
         assertEquals(emptyList<BaseItem>(), emptyList<BaseItem>().distinctForKeys(BaseItem::id))
     }
 
+    @Test
+    fun `items without identities are removed before lazy rendering`() {
+        val sanitised = listOf(row("row", BaseItem(name = "Incomplete"), item("valid")))
+            .sanitisedRows()
+
+        assertEquals(listOf("valid"), sanitised.single().items.map(BaseItem::id))
+    }
+
     // Two rows under one id crash the launcher's own LazyColumn — which the recommendation
     // refresh could produce by appending a freshly built row beside the one it was meant to
     // replace.

app/src/test/java/com/ponzischeme89/memby/ui/player/PlaybackRecoveryTest.kt

@@ -48,6 +48,16 @@ class PlaybackRecoveryTest {
         assertTrue(failure.canAutoRetry)
     }
 
+    @Test
+    fun malformedContainersDoNotLoopThroughTranscodingRetries() {
+        val failure = describePlaybackFailure(
+            PlaybackException.ERROR_CODE_PARSING_CONTAINER_MALFORMED,
+        )
+
+        assertFalse(failure.canAutoRetry)
+        assertFalse(failure.requiresTranscode)
+    }
+
     @Test
     fun automaticRetriesAreBoundedAndBackOff() {
         assertEquals(1_000L, automaticRetryDelayMs(1))
@@ -63,4 +73,17 @@ class PlaybackRecoveryTest {
         assertFalse(shouldRecoverProlongedRebuffer(true, false, true, false))
         assertFalse(shouldRecoverProlongedRebuffer(true, false, false, true))
     }
+
+    @Test
+    fun replacementSessionDetectionKeepsSameSessionStreamSwapsTogether() {
+        assertFalse(
+            playbackSessionChanged("episode", "source-a", "session", "episode", "source-b", "session"),
+        )
+        assertTrue(
+            playbackSessionChanged("episode", "source-a", "old", "episode", "source-b", "new"),
+        )
+        assertTrue(
+            playbackSessionChanged("episode", "source-a", "", "episode", "source-b", ""),
+        )
+    }
 }

app/src/test/java/com/ponzischeme89/memby/ui/player/PlayerTimingTest.kt

@@ -57,5 +57,13 @@ class PlayerTimingTest {
             PlaybackCompletionAction.PLAY_NEXT,
             playbackCompletionAction(hasNextEpisode = true, nextUpDismissed = false),
         )
+        assertEquals(
+            PlaybackCompletionAction.WAIT_FOR_NEXT,
+            playbackCompletionAction(
+                hasNextEpisode = false,
+                nextUpDismissed = false,
+                nextLookupInFlight = true,
+            ),
+        )
     }
 }