Black Crow untargetable and running around the map outside the arena.

Bug Report ID: #2004924018

Crowbell bugged out during 2nd phase and didn't pick up his bell.
Instead he became untargetable but continued to attack me so i managed to thunderous leap out of the arena.
Crowbell also leaped out and chased me across the map until i managed to get away.
Now he's half a map away, still untargetable and searching for me.
Help

https://imgur.com/a/9k2VgQ0