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
--- 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 +136,17 @@ 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).
+    val sessions = mediaSessions.values.toList()
+    mediaSessions.clear()
+    sessions.forEach { session ->
       session.release()
     }
-    mediaSessions.clear()
   }
 
   private fun hidePlayerNotification(player: ExoPlayer) {