This only happens in a greenskin siege quest. I fight a big group of greenskins and at turn 2-3 the game always freezes when it is the turn of an orc warrior. Tried 4 times already to repeat the battle and it ALWAYS freezes when an orc warrior is about to move.
Here is a picture http://imgur.com/a/mEPHw . I waited for 5 mins to see if the game unfroze but nothing happened. The music was still going though.
Log has 1600 KB so I can’t post it here.