"You cannot see your target" in Ankexfen Keep is bad... everywhere. Can be duplicated multiple times. exact locations I do not have but it was bad in the canyon, and in the snow hills (basically whole map). happened multiple times with and without lev... Most time it was fixed by moving, but with mage pets and suummon pets its horrible because you have to kill them off, call them back, or do a group CoTH to get the mob to move.
