Mobs Freezing in place after 10 to 20 minutes of gameplay

I was testing the newest snapshot for the new doors when I noticed mobs such as skeletons, zombies, spiders, endermen, and a possible chicken were frozen in place and could not be destroyed and were not burning in the daylight (the zombies and skeletons)

I restarted the game thinking that might clear it up but after another 10 to 20 minutes the mobs did it again.