VoIP calls ending automatically [flutter_webrtc]

Question

I am working on a Flutter app that utilizes VoIP functionality using the flutter_webRTC package. When attempting to make a group call using VoIP.newGroupCall, The call is created and when entering a call, it is getting initiated but ends automatically without any user interaction.

Sample code:

VoIP.newGroupCall(
  roomId,
  GroupCallType.Video,
  GroupCallIntent.Ring,
);

followed by groupCall.enter();

// VoIP delegate methods
@override
Future<void> handleNewGroupCall(GroupCall groupCall) async {
  logger.i("NEW GROUP CALL STARTED");
}

@override
Future<void> handleGroupCallEnded(GroupCall groupCall) async {
  logger.i("NEW GROUP CALL ENDED");
}

I have verified that the handleNewGroupCall method is being called, indicating that the call is initiated successfully. However, shortly after, the handleGroupCallEnded method is triggered automatically, indicating that the call ends abruptly.

How can I diagnose and fix this issue to ensure that group calls are not ended automatically?