It seems the one big glitch I run into almost every game when the computer has them is Impressive Warriors like Ogres and Rat Ogres getting stuck. They move to a wall to climb, or through a door, or sometimes get caught on a wall rather than going around it.
Other man-sized characters sometimes get stuck activating an ability and then not actually moving to attack or defend themselves. I see this when they are looking to jump down or when multiple levels are involved.

I'm playing Witch hunters if that matters. I have seen these issues with every other faction.

I'd love to see this fixed since I tend to destroy the other faction when a character or more is not "playing"
Let me know if I can assist.