The Tab hides automatically and flash for a while where it ask to share MicroPhone and Camera. I have test it on Android Firefox enabling Desktop Site because sometimes users face problem in connecting Camera or Microphone in app and sometimes in Chrome so Firefox needs to be supported in that case.
Please refer this video
Tested on all Mobile Devices.
It starts showing this problem from last 2 weeks, since the icons(toolbar- hangup mute and cam) has been changed and Tile View Options has been taken into Menu. Before it was working fine.
Jwt TOKEN - enabled. FireFox 66.0