For some reason, the AI act weir when they are on fire place, they keep moving and stopping repeatedly, which just make them move even slower in fire, but the problem is if you have a large army and all of them are in a forest for instance, and the forest is on fire, they lag the game way to much, and it keeps doing it while there is fire and they are on fire.
Could they just walk over it like normal, would be much better than having the AI trying to avoid it or whatever they are trying to do