I noticed two separate issues recently when using MC 20.017.
1) Pausing a TV show for a few minutes causes the audio to be muted when playback resumes. Stopping the playback and restarting it fixes the audio.
2) Playback of some TV shows causes a popup complaining that the audio format 5.1 is not supported but stereo is. I restarted the playback again and it worked without problems. This issue was only seen with FOX.