Mobs won't try to avoid 3.375 altitude difference which can get hurt.

In my experiment, mobs will get hurt on 3.375 altitude difference, but mobs only avoid 3.5 altitude difference.

I don't know how to place 0.375 height block without snow, so I just using 4-layer-snow to reproduce it.

Using controlled experiment to reproduce:

1. Put 28 snow pieces (equal to 3.375m) on the ground.
2. Put a cow on it.
3. Put 29 snow pieces (equal to 3.5m) on another ground. – control group
4. Also put a cow on it.
5. Watch them.

Finally, you can see that the cow on the 28 snow pieces (equal to 3.375m) left that position voluntarily, and got hurt.