I’m not very knowledgeable about all this stuff but from all the posts I’ve read, the Plex team usually want to see the logs, so that is why I suggested it.
Man, I have no idea when it comes to these audio files and how they play or don’t play.
As far as the beta version goes, I’m also in the Android TV beta program and I’m on version 8.1.0.17967 and I got that from the Google Play store, so I’m not sure what to say. That is a bit odd that it won’t let you update anymore.
Maybe you can side load it?