So I was doing a run through Utumno, made the keys and descended to the 3rd level. When I finally managed to find and activate the Melkor Plate and the light shot up, I couldn't seem to use it properly. Whenever I would enter it everything would go upside down and I couldn't exit Utumno. I had to switch to creative mode and fly to move out of the beam of light, and this is when I found out the game was sort of frozen. I could move, but all the other mobs were at a standstill and wouldn't take damage. Upon trying to close the world, it would just say 'shutting down internal server' for eternity and I had to shut down the computer to close the game. When I looked in the crash reports file though, it does't show anything.