I was in lysaga hill using a balor against the goristro spawns. I think there is some sort of issue where the summoned balor is not able to reach the goristro's to hit them. I tested 5 different balors, and when up against a goristro they walked right up to it, cast all their spells, then stood still and did nothing else. It is almost as if the balor is not able to reach the goristro (maybe its too big and can't reach the hitbox). This did not happen against the other enemies in the area, but happened versus every goristro.