Audio video call issue in mobile device and firefox screen share issue

We are using comet chat version 2.1 in the angular 8 projects. We are having the below issues:

  1. Mobile device: No screen share option and video glitches (black screen) on a few mobile devices
  2. Firefox browser - screen share button is not working
  3. User can initiate call despite being in the active call. Users can begin a call despite being in the call with another user. The below function return null even the user is incall.
    let activeCall = CometChat.getActiveCall();