Lag when riding on Horse/Donkey.

Put the summary of the bug you're having here

What I expected to happen was...:
No lag when riding on Horse or Donkey

What actually happened was...:
Every time i go to new chuck or new areas, while riding on Horse or Donkey, you stand for 1 second and move again and it repeats all the time.

Steps to Reproduce:
1. Try to tame a horse or donkey.
2. Put Saddle on horse or donkey and move to new areas (Or chuncks)
3. Prepare for Terrible lag.