devicesChangedEventStream` on iOS does not emit a device removed event when Bluetooth disconnects

[ChiragLiveu]

Hi,

I'm using the latest version of the audio_session package on both iOS and Android.

I noticed that devicesChangedEventStream works correctly when a Bluetooth device is connected. The stream emits an event, and devicesAdded contains the connected device.

However, when the Bluetooth device is disconnected, no event is emitted. As a result, devicesRemoved is never populated, and I have no way to detect that the Bluetooth device has been removed.

Is this expected behaviour on iOS, or is it a bug? If this is a known limitation, could you please suggest a workaround to detect Bluetooth device disconnection?

Here is my code:

audioSession.devicesChangedEventStream.listen((event) {
  print('Devices added: ${event.devicesAdded}');
  print('Devices removed: ${event.devicesRemoved}');

  Future.delayed(const Duration(milliseconds: 1000), () {
    updateAudioSwitchList(audioSession);
  });
});

Expected behaviour

• An event should be emitted when a Bluetooth device is disconnected.
• devicesRemoved should contain the disconnected device so that the application can update the available audio routes.

Actual behaviour

• An event is emitted only when the Bluetooth device is connected.
• No event is received when the Bluetooth device is disconnected.

I would appreciate any guidance or workaround for handling Bluetooth disconnection on iOS.

Thank you for your time and support!