http://i.imgur.com/72CzQFK.jpgAfter fighting that battle, I accidentally killed the male character with the cold AoE spell (even though he did not glow red on the "aoe range" thing.
So I reloaded a quick-save for like 10 seconds before that fight, and every time I ran to that spot and the battle started, the game would basically stop moving. Not freeze, just no action would work.
Over one of the NPCs (human on the right), a message would spam very fast saying "force end turn"