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

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.