DisplayIncomingCall UI appears for a few moments -> then Disappears (IOS)

Bug report

• I’ve checked the example to reproduce the issue.

• Reproduced on:

• iOS

Description

This only happens sometimes, and I can’t find how to make it consistent. But it is a critical bug for myself. When call is incoming on IOS device, sometimes the DisplayIncomingCall UI displays, for < 1 second. Then disappears. The call is still incoming via my VOIP SDK but the incoming call UI screen disappears on IOS. I am not sure what makes this happen. The code is very simple.

Steps to Reproduce

• Call IOS Device
• Display Incoming Call UI
• UI Appears for a moment then disappears (Happens on randomly, but is critical as there is no way to connect the call when this happens)

Versions

- Callkeep: Latest
- React Native: 0.63.2
- iOS: 13.5.1
- Phone model: Iphone 6

Code

  const oneTimeId = () => {
    callId.current = callId.current || uuid();
    return callId.current;
  };

  const onCallListener: Listener = async (session, _userId, extension) => {
    ext.current = extension || initExtension;
    sess.current = session || initSession;

    const name =
      users.find(u => u.id === sess?.current?.initiatorID)?.name || '';
    const id = oneTimeId();
    RNCallKeep.displayIncomingCall(id, name, name, 'generic', true);
  };

[netstratum-labs]

We have a similar issue for outgoing calls too ( we are not using callkeep for incoming calls ). On iOS 13.6 when we lock the screen the callkit UI flashes and shows the lock screen and the microphone icon shows in red instead of green.

As we are not using it for incoming calls, we have not implemented Pushkit. Under background modes we have only selected VoIP.

Any thoughts?

[nghianvbsc]

Same issues, debug mode working like good , but this bug on release mode, at receive call from voip native code