Volumio stopping play

I play songs in Volumio based on genre, with hundreds of songs in each genre. I think Volumio implements this by putting the songs in a playlist.

Volumio plays a couple, but after a random number of songs it doesn’t start a new one, becoming silent.

OK, I check the web UI. There I see Volumio correctly has picked a new song, but it isn’t playing. But the web UI thinks it is, because it’s moving the round progress bar when i refresh the page (hit F5). It continues even after the song should have ended, so I see it is at, for instance 6:46 in a song with length 3:40.

I have to manually hit Play button to continue playing. This is really annoying. To help fixing the bug, is there some log or anything else I can check when this happens to shed more light on the problem?