Bug on latest beta 2.52.8 - no sound on some channels

I love this App, the best for Android TV. Thanks to the developer! :)
Let me just report that some channels have no sound on the latest beta version 2.52.8. I've reverted to an older beta version and the channels do have sound, but not on 2.52.8. To test the problem just load the legal IPTV list named Kitina (some just work for Portugal maybe)
List: http://lista.kodiportugal.com
EPG: http://epg.kodiportugal.com

ps.: the problem only occurs with the builtin ProgDVB player option active.