diff --git a/node_modules/expo-video/android/src/main/java/expo/modules/video/AudioFocusManager.kt b/node_modules/expo-video/android/src/main/java/expo/modules/video/AudioFocusManager.kt
index aa911b1..671bf05 100644
--- a/node_modules/expo-video/android/src/main/java/expo/modules/video/AudioFocusManager.kt
+++ b/node_modules/expo-video/android/src/main/java/expo/modules/video/AudioFocusManager.kt
@@ -21,7 +21,9 @@ class AudioFocusManager(private val appContext: AppContext) : AudioManager.OnAud
     }
   }
 
-  private var players: MutableList<WeakReference<VideoPlayer>> = mutableListOf()
+  // CopyOnWriteArrayList z tego samego powodu co listeners w VideoPlayer: register/unregister
+  // przychodza z watku JS i sprzatajacego, a forEach po liscie idzie na glownym (Goon, GOON-7A).
+  private val players = java.util.concurrent.CopyOnWriteArrayList<WeakReference<VideoPlayer>>()
   private var currentFocusRequest: AudioFocusRequest? = null
   private var currentMixingMode: AudioMixingMode = AudioMixingMode.MIX_WITH_OTHERS
   private val anyPlayerRequiresFocus: Boolean
@@ -89,8 +91,10 @@ class AudioFocusManager(private val appContext: AppContext) : AudioManager.OnAud
   }
 
   fun registerPlayer(player: VideoPlayer) {
-    players.find { it.get() == player } ?: run {
-      players.add(WeakReference(player))
+    synchronized(players) {
+      players.find { it.get() == player } ?: run {
+        players.add(WeakReference(player))
+      }
     }
     player.addListener(this)
     updateAudioFocus()
@@ -98,7 +102,7 @@ class AudioFocusManager(private val appContext: AppContext) : AudioManager.OnAud
 
   fun unregisterPlayer(player: VideoPlayer) {
     player.removeListener(this)
-    players.removeAll { it.get() == player }
+    players.removeIf { it.get() == player }
     updateAudioFocus()
   }
 
diff --git a/node_modules/expo-video/android/src/main/java/expo/modules/video/playbackService/ExpoVideoPlaybackService.kt b/node_modules/expo-video/android/src/main/java/expo/modules/video/playbackService/ExpoVideoPlaybackService.kt
index cd798cf..8cb6dfb 100644
--- a/node_modules/expo-video/android/src/main/java/expo/modules/video/playbackService/ExpoVideoPlaybackService.kt
+++ b/node_modules/expo-video/android/src/main/java/expo/modules/video/playbackService/ExpoVideoPlaybackService.kt
@@ -26,7 +26,7 @@ class PlaybackServiceBinder(val service: ExpoVideoPlaybackService) : Binder()
 
 @OptIn(UnstableApi::class)
 class ExpoVideoPlaybackService : MediaSessionService() {
-  private val mediaSessions = mutableMapOf<ExoPlayer, MediaSession>()
+  private val mediaSessions = java.util.concurrent.ConcurrentHashMap<ExoPlayer, MediaSession>()
   private val binder = PlaybackServiceBinder(this)
 
   private val commandSeekForward = SessionCommand(SEEK_FORWARD_COMMAND, Bundle.EMPTY)
@@ -136,10 +136,20 @@ class ExpoVideoPlaybackService : MediaSessionService() {
 
   private fun cleanup() {
     hideAllNotifications()
-    mediaSessions.forEach { (_, session) ->
+    // Kopia przed iteracja: session.release() wola z powrotem unregisterPlayer, ktory
+    // usuwa wpis z mediaSessions w trakcie forEach -> ConcurrentModificationException
+    // przy zamykaniu apki z listy ostatnich (Goon, Sentry 147164135, 2026-09-15).
+    // Mapa jest ConcurrentHashMap (patrz deklaracja), bo sama kopia tez iteruje mape,
+    // a wpisy znikaja z innego watku przy zwalnianiu playera: na LinkedHashMap `toList()`
+    // wywalalo sie wtedy tak samo (Goon 0.4.1, Sentry GOON-6W, 2026-09-17).
+    // ArrayList(values), nie `toList()`: toList przy rozmiarze 1 robi iterator().next(),
+    // a wpis moze zniknac miedzy size() i next() -> NoSuchElementException (Goon 0.4.2,
+    // Sentry GOON-72). Konstruktor idzie przez toArray(), ktore mapa robi bezpiecznie.
+    val sessions = ArrayList(mediaSessions.values)
+    mediaSessions.clear()
+    sessions.forEach { session ->
       session.release()
     }
-    mediaSessions.clear()
   }
 
   private fun hidePlayerNotification(player: ExoPlayer) {
diff --git a/node_modules/expo-video/android/src/main/java/expo/modules/video/player/VideoPlayer.kt b/node_modules/expo-video/android/src/main/java/expo/modules/video/player/VideoPlayer.kt
index ec7accf..dd365e3 100644
--- a/node_modules/expo-video/android/src/main/java/expo/modules/video/player/VideoPlayer.kt
+++ b/node_modules/expo-video/android/src/main/java/expo/modules/video/player/VideoPlayer.kt
@@ -44,7 +44,11 @@ class VideoPlayer(val context: Context, appContext: AppContext, source: VideoSou
   private var renderersFactory = DefaultRenderersFactory(context)
     .forceEnableMediaCodecAsynchronousQueueing()
     .setEnableDecoderFallback(true)
-  private var listeners: MutableList<WeakReference<VideoPlayerListener>> = mutableListOf()
+  // CopyOnWriteArrayList, nie ArrayList: close() (watek JS albo sprzatajacy obiekty) wypisuje
+  // stad AudioFocusManager, a glowny watek w tym samym czasie rozsyla zdarzenie po prepare()
+  // i iteruje liste -> ConcurrentModificationException (Goon 0.4.2, Sentry GOON-7A, Edge
+  // tworzy i zwalnia odtwarzacze przy kazdym przewinieciu). Iteracja idzie po migawce.
+  private val listeners = java.util.concurrent.CopyOnWriteArrayList<WeakReference<VideoPlayerListener>>()
   val loadControl: VideoPlayerLoadControl = VideoPlayerLoadControl.Builder().build()
   val subtitles: VideoPlayerSubtitles = VideoPlayerSubtitles(this)
   val trackSelector = DefaultTrackSelector(context)
@@ -320,13 +324,16 @@ class VideoPlayer(val context: Context, appContext: AppContext, source: VideoSou
   }
 
   fun addListener(videoPlayerListener: VideoPlayerListener) {
-    if (listeners.all { it.get() != videoPlayerListener }) {
-      listeners.add(WeakReference(videoPlayerListener))
+    synchronized(listeners) {
+      if (listeners.all { it.get() != videoPlayerListener }) {
+        listeners.add(WeakReference(videoPlayerListener))
+      }
     }
   }
 
   fun removeListener(videoPlayerListener: VideoPlayerListener) {
-    listeners.removeAll { it.get() == videoPlayerListener }
+    // removeIf listy (atomowe), nie kotlinowe removeAll { }, ktore usuwa po indeksach.
+    listeners.removeIf { it.get() == videoPlayerListener }
   }
 
   private fun sendEvent(event: PlayerEvent) {