Spread players not working sometimes.

What I expected to happen was...:
It would work all the time just like
how it does in 1.8.8 so I could use it on
my server, without having players to relog
when they exit spawn.

What actually happened was...:
it fails to load up the chuncks sometimes
when being used, Like if one entered void.

Steps to Reproduce:
1. use spread players multiple
times. mainly occurs when you
use it while facing towards a wall.

OR ---->2. use it in certain buildings, like server
spawns. when using it in my spawn, it never seems to work