This playthrough I noticed the Goblin Camp Navmesh is really broken. Ladders that you climb up one side and down the other, they do not connect to any surface but the ground. I started a battle on the upper tier of the goblin camp. I specifically watched the goblin Crusher climb up and down the same ladder, the run into the castle wall and pop up out of the floor. I also had goblins climbing up vines and popping out of crates and piles of rubble. When I cast grease centered on the area the goblins were appearing from, it exploded on Gale and Shadowheart some 20-25 meters away and the were not even close to the grease AOE. There were several similar instances inside the defiled temple as well.