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On iPadOS13 all "AVAudioPlayerNodes" that are attached to an "AVAudioEngine" are over-released after a "Media Service Rest".My application uses the "AVAudioEngine" similar to the "AVAudioEngine3DAudioExample".When I reset the media service (settings>developer>reset media service) my application receives an "AVAudioSession.mediaServicesWereResetNotification". When my app receives this notification, the app reattaches the player nodes to a new AVAudioEngine.Like this example from "AVAudioEngine3DAudioExample" ( ~ line 438).// Example form AVAudioEngine3DAudioExample - (void)createEngineAndAttachNodes { _engine = [[AVAudioEngine alloc] init]; [_engine attachNode:_environment]; [_engine attachNode:_launchSoundPlayer]; for (int i = 0; i < _collisionPlayerArray.count; i++) [_engine attachNode:[_collisionPlayerArray objectAtIndex:i]]; // <- Crash } // Example in Swift as I use it in my app func createAVAudioEngineAndAttachNodes() { // Create a new engine self.avAudioEngine = AVAudioEngine() self.avAudioEngine.attach(self.avAudioEnvironmentNode) // Attach all nodes. for player in self.allAudioPlayers { self.avAudioEngine.attach(player)// <- Crash } }Crash: EXC_BAD_ACCESS (code=1, address=0x0) #0 0x0000000187538240 in objc_retain () #1 0x00000001944b83a8 in -[AVAudioPlayerNode didAttachToEngine:] () #2 0x00000001944c4690 in AVAudioEngineImpl::AttachNode(AVAudioNode*, bool) () #3 0x00000001944c7dcc in -[AVAudioEngine attachNode:] () #4 ....I'm using swift 5 and the code works perfectly on iOS12 and macOS. I assume the media reset somehow destroys the AVAudioPlayerNode because it crashes when the AVFoundation framework trys to retain the audio player.Can someone confirm this issu or provide a workaround?