The bug
Wind charges can go faster if hit with a knockback sword. This can also happen with end crystals.
Steps to reproduce:
Hold a sword with the knockback enchantment and a wind charge in your off-hand.
Throw the wind charge and hit it with your sword as soon as you can.
Notice how the wind charge is going faster than its supposed to be.
Intended behavior
The wind charge should move at the speed no matter what.
Actual behavior
The wind charge can go faster with hits from swords with knockback, hits from end crystals, etc.
Video
Here's a video demonstrating the bug using a knockback sword:
Related issues
Comments

MC-270377 is relevant to the sword part of this issue. It may actually make sense to seperate this report into two issues, considering the difference in gameplay.
Can confirm as of 24w06a.