Hi i have the same problem
and i have tested all the previous versions and the problem starts from Android TV_v1.4.61g and i have tried all the resolutions settings no change.
plus play back of the live tv when i select a different audio track it will jump back a page and say it can't play that file
however if i use an external player VLC i can change audio tracks no problem,
and the Android app the standard one works fine with the audio.
also the Android TV app needs a setting so that it remembers the username and password all the time at the moment if you come out of the app then go back in you have to put back in the user name and password a real pain
thank you for your time
and carry on the good work guys