This time it was the last orc that was left, hiding in a bush (invisible to me) while two Landsknehts were beating him up.
The invisible orc is in that bush just right of the white spot. Odd that he’s still invisible to me when my allies are fighting him.
Edit: Nope. Reloaded and also got same freeze when 8 orcs were still alive. The battle just freezes and nothing happens anymore. And it’s always a forest battle too. Could it have something to do with hiding in bushes?