Hi - I'm sorry about the trouble, and the delayed response!
The only thing that comes to mind is that something is causing the sound device/driver to re-initialize on your system when this happens. Unfortunately the game doesn't handle this scenario (more easily reproduced by, say, starting the game with headphones plugged in and then unplugging them); it's something I'd like to look into it's some point but it's fairly involved.
Not sure what to suggest as far as fixing this on your end, though; apologies.