Fireball hitbox too big

The bug

Apparently fireballs have a "too big" hitbox.

How to reproduce

1. /summon fireball ~ ~ ~ {direction:[0.0,0.0,0.0]}
2. Move above the fireball
3. Press F3+b to show the hitboxes
4. Hit next to the fireball outside of the hitbox
   → The fireball still gets punched

Another bug is that it renders incorrectly. When you are above, it is rotated but not shifted (see screenshot). The red point shows the position where it should actually get rendered.