I have progtv android
It works for ac3 srtreams in version 2.89.4 but not in last version.
Stream with ac3 audio start wel in external mx player.
Except mediaplayer+ en external player is there another way to play ac3 ?

No sound or no picture?

Both black screen with no sound
1920 × 1080 h264 ac3
The stream works when i choose external mx player
Another issue when you choose an external player is not instant stil showing mediaplayer+
You have to switch to another channel en back and then it works

I try more debug mp+ mode for next version. Thanks for report.