Has anyone else experienced this on Minecraft xbox 360 edition?

I put on Minecraft this morning, everything looked normal, then I went to the kitchen of my house where I had 2 npc villagers, one of them was standing in one spot and not moving, and the other one was running around like crazy spinning it's head around. I was just interested to know if anyone else has experienced this and if anyone knows what causes them to do this. I suppose it could be a bug in the villager's AI, any thoughts?

Personally, I've never come across this on the 360, so I guess you were just unlucky and found a bug, just gotta hope it gets patched I guess