I'm at mission 12 in World in Conflict, and as soon as I have to break through the soviet lines and push them back into town, the enemies just don't spawn. I even went into town with all my tanks. No enemies, nothing. The objective still remains, and after waiting for 15-20 minutes for enemies to spawn, I've concluded it's some kind of bug. Nobody else seems to have this bug, I googled. Anyone who has played this game and can help me?