Terrace boss bug, it just got stuck and was not killable

Was doing Terrace Tier:8 with a divine vessel in the map device. Upon entering the boss room, I phase the boss quickly, and it gets stuck in the middle of the room, sending orbs but no adds spawn, and nothing happens. I've tried teleporting out, and even dying on it to see if anything happens, it didn't.

Reference number is 2.205.802.673

https://imgur.com/F3pi3OZ