The siege battle starts, everything is ok, fps is good as usual. I break the gates, put ladders on the walls, everything still fine. But when the AI sends his units up the wall and we start fighting then my fps drops so hard that it made the game unplayable and i had to quit the battle. So far i encountered this only in Kabula. I think the AI is trying to do something wich drains the processor.
The same thing happened in another mod only when i destroyed the siege equipment of the besieging army, the AI was going nuts because it didn't know what to do next and was ripping my processor to shreds. I think there is an issue or something with the navigation or something in this settlement.