Temple Room Bug I'm Stuck!!!

Boss in room not moving and I am stuck in the room. Clear all mobs except the boss. It's so frustrating when it is my Architect run.

EDIT: Managed to respawn at checkpoint but entering the room again cause me to remain stuck inside. THis meant that I am unable to complete the temple?

I've gotten this on some campaign bosses and the only way to solve it is by killing the instance and resetting the boss. So in this case you are SOL.