So this happend 3 times to me today on 3 matches.
I take it is a bit more than uncommon and would like to know if others got it too:
http://forums.warchest.com/showthread.php/46209-Server-crash-at-end-of-SW
Stopwatch:
First round attackers are held at a stage.
Second round attackers make it further and would thus end the game early. The server crashes, all players lose connection.
This happend on pub and comp mode.