Kang fight is bugged.

Coolinte

I was doing the Kang fight in act 7.4.6. I was using jean grey in phase 2. After I completed phase 2, the screen went blank. Nothing is showing, only the pause menu. Resuming the fight is showing a blank screen that's all. I thought this would be a one time thing. So I closed the game and restarted, the same thing happened again just after completing phase 2. I think this is bugged. If not, how can I fix it?