Bug Report - Phaaryl Megalith Boss Fight AI Freeze

Bug Report ID: #4155592470

I am doing the Phaaryl unique map. I killed the worm boss (the burrower?) and the next boss to spawn (Serpent Queen) spawned inside the body of the worm boss, which still has collisions. The serpent is not attacking unless I use leap slam to get as close as I can get to her, and even then most of her attacks miss. I am using Storm Mages and if I use minion targeting they will attack her, but neither they nor anything else I try can deal any damage to her. Very disappointing because it means I need to do the whole map over again.