What occurred: So I was about to make a map then realized that entities freeze when you go far enough of your render distance. Slimes freeze in midair, Withers freeze in motion, even mobs running from something also freeze.

What should've occurred: When entities are out of your render distance, they should either vanish until loaded again, or continue to properly function until you are far enough from your Entity Distance setting.

How to reproduce:

1. Load up a fresh new world (I did a flatworld)

2. Set your settings to: Render Distance of 4, Entity Distance of 100%, 

Extra notes: If your computer is super good and runs with over a Render Distance of 16, you may not see this. But for people who play on low render distance like 4, this can occur.