I noticed this quite some time ago but when I am playing the game with my headphones on I have sound. If, for whatever reason, the headphones accidentally get unplugged then my sound is gone and I can no longer hear anything. Even if I replug my headphones in. I need to shut down the game, return to desktop, then log back in to get my sound working again. It wont even play through speakers, the sound is just dead.

I don't have this issue with any other game or program I use. Is this a bug?