Trying to jump on an unsaddled Horse, then equipping it with a saddle makes the Horse jump automatically

Trying to jump on an unsaddled horse, then equipping it with a saddle makes the Horse jump automatically.

Steps to reproduce
1. Tame a Horse.
2. While riding it without a saddle hit "jump" button.
3. Equip it with a saddle.

Upon equipping the saddle the Horse should jump automatically without hitting the "jump" button.