It seems like about 40-50% of the time Iron Golems spawn in my village they spawn on the block below surface level, inside of the (typically grass) block. They aren't able to move unless I push them, and they cant jump out of the block or attack anything (even me) until I dig out a few blocks next to them and push them over into the new empty space. It's happened a lot and it's starting to become a major inconvenience.