(Deep Boss Map) Lady Elswyth Dancing Softlock

Bug Report ID: #2638405657

I had a boss room with an abyssal pit. As soon as I entered, Thane did his introduction. I was clearing out the pit first and the boss fight began as some of my projectiles aggroed him so I killed him. He appeared to be afflicted with the abyss tinge of typical abyss mobs. However, Lady Elswyth never stopped dancing. This made it impossible to leave the boss room to backtrack and also impossible to complete the map as she is untargetable and invincible and nothing seems to aggro her. I was also able to portal out of the boss room in a corner before the fight began but after I cleared most of the pit which I think is another bug?