Broken/disappearing hit boxes and collision detection on Zalmarath fight.

Half the fights, ALL direct attacks to his torso go through and make no contact, leaving only arms and hands with hittable hit boxes. Some fights I can damage him and hit his torso but other fights they don't cause damage at all and just ho through. Also broken collision detection around the cracked edges of the arena he breaks off, leading to extreme screen shake and even falling off the edge and back on again.