Mob's collision boxed don't update when they grow, but their hit boxes do EDIT: sorry, its fixed on 07a

I expected the mobs to not walk into walls and die, but they did.
To reproduce just:
1. Make some baby villagers and let them grow up.
2. Once they are grown push them next to a wall and they will suffocate because their collision boxes are still baby sized. This also allows for many once-baby mobs in a space to glitch through their walls when the chunks are unloaded.
EDIT: sorry, its fixed in 07a