In my application, I use CallKit and have supportsHolding = true set. During my phone call, another call comes in (e.g., GSM). I accept the incoming call and put the current call on hold.
If I end the active call myself, everything is fine, and CallKit calls the
method provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession).
However, if the other party ends the call, the second call remains on hold. In the application, the user clicks on unhold, and I notify CallKit that the hold has ended.
But in this case, the didActivate method is not called at all. If I try to activate the audio myself after unhold, I receive the error:
Domain=NSOSStatusErrorDomain Code=561017449 "Session activation failed" UserInfo={NSLocalizedDescription=Session activation failed}
AVAudioSessionErrorInsufficientPriority == NSOSStatusErrorDomain Code: 561017449
What needs to be done for CallKit to activate my audio?
