FPS drops for one player.

These observations are still happening

Observations
1. Only player one is effected in FPS dropping. While player two can run around with no problem. Only if player one doesn't move/look around. If player one stands still player two can move smoothly, until player one starts walking. 
2. Turning the FPS bar down changes nothing.
3. Mobs aren't affected when Frame Rate drop for player one and two. Only players are losing frames.