Audio cutting out when playing with a friend.

This might be a known bug, but I don't know where to check.

I hose a game, and a friend joins me. After 10-30 minutes or so, I stop hearing ADA at all. The longer we play, the more the audio breaks. I'll stop hearing the background sounds, I get the first part of the chainsaw and then it's quiet, etc. After 2 hours or so, it's kind of unbearable without just playing music in the background for myself.

I know I can save, reload to fix it, but that's aggravating when we play for 6-12 hours at a time.

Is this a known bug with 1.2? Should I try changing any settings to fix it?

Appreciate any help I get with this.