I know this happended before, but I don't know if someone in this snapshot found out already.

What I expected to happen was:
Either grass not being there, or grass blocks under the grass.

What actually happened was:
The grass was floating in mid-air, I restarted the world but it was still there. When I punched one grass, others around it broke too, so it only needs an update.

Steps to reproduce:
Fill in seed: -1602962606
Go to coördinates: -864 70 327

P.S: again, I know this is a very common bug, and it already happened since the beginning of minecraft, but I don't know if it has been reported for this snapshot already. If so, sorry!