I have experienced a similar thing in the HH-1. I go to assist attack or click on a mob and start to run in another direction opposite of where I need to be, because another mob has aggro on me from another area that is usually not there or in another room. I have tried escape, leaving the area and etc. and I still can't click or assist attack unless I go back find them and kill them. It has also happened in the HH-2, but not as often. I will have to run some runs and get back to you, Agatio with mobs names and coords, location of the HH.