answerCall not work in IOS 16.4.1

I have set the following settings

useEffect(() => {
    const options = {
      ios: {
        appName: 'App',
      },
      android: {
        alertTitle: 'Permissions required',
        alertDescription:
          'This application needs to access your phone accounts',
        cancelButton: 'Cancel',
        okButton: 'ok',
        imageName: 'phone_account_icon',
        additionalPermissions: [],
        // Required to get audio in background when using Android 11
        foregroundService: {
          channelId: 'com.app',
          channelName: 'Foreground service for App',
          notificationTitle: 'App is running on background',
          //notificationIcon: 'Path to the resource icon of the notification',
        },
      },
    };

    RNCallKeep.setup(options).then(accepted => {
      console.debug('[INIT SUCCESS ' + Platform.OS + ']');
    });
    RNCallKeep.addEventListener('didChangeAudioRoute', ({output}) => {});
    RNCallKeep.addEventListener('didLoadWithEvents', events => {
      console.log('[CallKeep ' + Platform.OS + ']', 'Events');
    });
  }, []);

Then I want to listen for events when the user accepts or rejects the call through the system window

RNCallKeep.addEventListener('answerCall', ({callUUID}) => {
      startCall();
    });
    RNCallKeep.addEventListener('endCall', ({callUUID}) => {
      endCall();
    });

But this event does not fire. It's the window I call when I get a push

RNCallKeep.displayIncomingCall(
      q.uuid,
      q.number,
      user === undefined ? q.number : user.label,
      'number',
      q.type === 'video',
      null,
    );

What could be the problem?

Start with the supplied RNCallKeep setup, addEventListener('answerCall'/'endCall'), and displayIncomingCall flow on iOS 16.4.1. Reproduce the system call UI and trace whether either callback is received after accepting or rejecting the call. Done means the missing event path or triggering condition is identified and documented.