Put the summary of the bug you're having here

What I expected to happen was...:
Mob to fall

What actually happened was...:
The horse acted like the leash was still on.

Steps to Reproduce:
1. Open a new world in survival
2. Open to LAN and make it creative and cheats on. Change your gamemode to Creative mode
3. Get a horse (pig will work too)
4. Put a leash on the pig or horse
5. Fly in the sky so the horse or pig will be off the ground.
6. Right click the pig or horse
7. Observe as the mob acts like it still has a leash attached. Even if you are walking it will still act like that.