If you pause the game, then unpause and quickly moves your camera around, your player head and body does not instantly follow the camera rotation, instead it will freeze on previous rotation for half seconds, and then instantly snap to current camera rotation, it's more noticeable when you moves your camera up and down, seems to only happens when you have Screen Animations enabled.

Steps to reproduce:

1. Enable Screen Animations
2. Join any world and then pause the game
3. Unpause and then quickly move your camera around

Expected results:
Player heads and body moves alongside the camera rotation.

Observed results:
Player heads and body will freeze on previous rotation for half seconds, then instantly snap to current camera rotation.