Ridden pig on a grass path is constantly jumping

Riding a pig with a carrot on a stick in hand and going on the new grass path makes the pig jump uncontrollably.

How to replicate:

• saddle a pig
• get on him with the carrot on a stick in hand
• move him to a grass path .

Full video hope you don't mind I put it on youtube Link: https://www.youtube.com/watch?v=qt4xT76aM6E