Spamming Mount Causes Player to Teleport

When spamming right click on an entity with a saddle while dismounting(holding crouch) at the same time, it will cause the player to be on the mob, but able to move around as if he wasn't? If you move out far enough, the chunks fail to load because it still thinks your location is on that mob, and when you crouch again, you teleport back as if you were dismounting it.
https://www.youtube.com/watch?v=feLlOxHhoms&feature=youtu.be

• The mobs this works on are:
  Pig
  Strider
  Llama + Traders Llama

Horses + donkeys are excluded because their inventories don't allow you to do this.
Minecarts and boats don't get effected by this for whatever reason.