I’m gonna have to raise my hand in solidarity. Plex on android does not communicate and trigger my Plex server to convert any file I have in HE-AAC audio. It stalls and for about 2 min does nothing. I’m lucky to have a EAC3 5.1 audio stream along side that will transcode into a 5.1 AAC stream. I prefer the original HE-AAC stereo stream though. What I do to combat this issue is go into my Plex local host and select all the EAC3 5.1 audio streams per episode that I plan on watching ahead of time. Then, if I go back into Plex for Android and press play on an episode, it then starts playback correctly with no issues.