New line of vision hitbox / direction tag is incorrect for some entities

The new direction hitbox animation is incorrect for at least the following entities:

• Items (when throwing one, it chooses a random direction)
• Lure of fishing rod (spins the whole time)
• Arrows (messed up, see also TIL an arrow fired North or South will have a rotation argument in the direction they are travelling, while an arrow fired West or East, will have a rotation argument of the opposite direction...)
• Thrown Potions and XP-Bottle (only North or South)
• XPOrbs (random like items)
• Horses (incorrect: 14w29b see screenshot; seems sometimes to happen when they want to rotate their head and then start eating)
• Enderdragon (incorrect)
• Fireworks (incorrect)
• Minecarts