Temple boss bug - Atziri gets stuck at 5% then freezes and becomes immune

Phase one was fine, but right as phase 2 ended she stands in the center of the room, not animating or moving. the blood lightning continues to fall endlessly but she does not take any damage. I tried to respawn at checkpoint and it resulted in a second Atziri (see picture) appearing in the center slightly above the snake Atziri, but both stuck without animations while blood lightning just falls endlessly. I found no way to resolve this and had to close the temple.

This also happens with the unique floating fire Zerohk that spawns from the Vaal circles in maps and (now as of 0.40c) sometimes in the temple where he will go under ground to do his fire burrow attack, become invulnerable, but never emerge from the ground and makes the Vaal circle or Temple room impossible to complete due to being stuck in an invulnerability phase.