When we climb a sand block with a horse, sometimes we bug like if a jump who we stuck in the air. And sometimes that kill me.

What I expected to happen was...:
Normally, the horse should climb the sand block.

What actually happened was...:
The horse don't climb this sand block and we stuck. I can escape by going to the side. 

Steps to Reproduce:
1.  Take a horse
2.  run in a desert
3.  try to climb a sand block

4. It's all

5. if you want to escape

6. go on your left