Hey there again ^^
I found another bug. My friend and I played the Co-op Survival against the KI.
After we failed miserably to defend our Stations, their HP sunk down very quickly, suddenly the enemys stopped shooting.
About 2 or 3 bars of the structure were left, but the KI did nothing. My friend (still alive) was able to select his ships, but could not command them. Also his Warpstations. After three minutes we were back again in the Main menu... without loading screen.
So basically, everything froze exept the environment.