The bug
Wind charges are deflectable with hits that are outside of their hitbox.
Steps to reproduce:
Throw an ender pearl
Right before the pearl lands throw the wind charge
Turn around, hit the wind charge and notice how you can hit it even though you didn't aim at the hitbox of the wind charge
Intended behavior
It should only deflect when you've hit the hitbox
Actual behavior
It lets you deflect the wind charge even though you didn't actually hit the hitbox
Video
Here's a video demonstrating the bug:
Duplicates MC-266871, which was resolved as WAI. The larger hitbox is presumably to allow it to be easier and more consistent to deflect.