King in the Mists bug

Doing King in the mists fight. Instantly phased him to the maze. Exited the Maze where he spoke a line. Transformed while up top. Then proceeded to never come down, and is just stuck running away from me while up there. Moving to other side of the arena has no impact as he appears stuck behind the purple fire.

Managed to kill him while he is up there by praying my marionettes spawned up top. The burning ground eventually did him in. Cant access loot either due to the walls. (Im unconcerned on that bit, but good to know)