OK, here's the deal:

I have a playlist consisting of two files set up. The other is 20 minutes of silence in OGG, the other is a 6 second wave file of a flute sound.
I have made a sequence of these two files that will play through the night to help give me cues to become lucid in my dreams. Well, what has now happened three nights in a row is that EVERY morning I find that Foobar has stopper playback at 16 seconds from the beginning of one of the instances of that 20 minute silence OGG at a little over 7 hours of overall playback time.
It's every time the exact same position, exactly at 16 seconds. The playback seems like it's paused. If I press play, the playback continues. Have yet to see what happens if I press pause.

This is very confusing!

I'm using the latest big installation of Foobar, 0.8.3.