Forge version:
Twilight Forest version: 1.16.5-4.0.490
Link to crash log: no crash.

Steps to reproduce:

1. Ride an animal, for example a horse.
2. Shoot with Ender Bow to another mob.
3. After being teleported press crouch.

What I expected to happen:
I would expect to crouch.

What happened instead:
But instead you are teleported back to the horse's side as if you just dismounted.

Its because you dont actually dismount when you get teleported, the game still thinks youre riding a mob. It does still need to be fixed though as that isnt exactly intended.