Note: I realize there are connection issue threads but I couldn't find one related to this. I also waited to post this after the most recent update to make sure it still happens. 1) Multiple Windows 7 Ultimate 64-bit systems on LAN with the same Linksys router. 2) Monster Alienware system starts server, LAN option checked. 3) Other systems connect and begin playing. 4) After about 3 minutes the match resets with no warning, back to menu. 5) Restart match again, either crossfire or blitz, works perfectly second time.
For me it's in-game (blitz and crossfire). Doesn't seem to happen with the dedicated server (SRCDS) blitz and crossfire.