Audio issues.

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?

It is very frustrating, but the client has never had an option for audio source selection.

You can change video resolution, screen modes, etc, all in game on the fly. To change your audio output, there is no such provision and you must log out.
Very frustrating if you ever want to change audio source or accidentally disconnect it.