New Bee Mobs occasionally freeze in mid air.

Put the summary of the bug you're having here

What I expected to happen was...:
Bees to fly uninterrupted as there where no obstructions in the air.

What actually happened was...:
The bees continuously get stuck, frozen in mid air. 

Steps to Reproduce:
1. just spawn a bee, and wait. they'll freeze within a few minutes. you can hit or push them and they'll return to normal for a little bit, but go back to being frozen.
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