I finished the skeleton king fight with my monk and a rare belt dropped. I had it in inventory and it said couldnt identify. Closed inventory and went to head to next part of game and got booted. Took me to screen with picture in the middle and resume game on the top of menu on the left. When i resumed i had every item from the skeleton king except the rare belt. Not sure if an actual bug but thought i would post it. Single player mode level 9-10 monk.