Wind Burst activates while mace is on cooldown

The Wind Burst enchantment activates while the mace is on cooldown (the sword icon isn't fully filled up after an attack and you won't do full damage). This is in contrast to a sword's sweep attack, which will never activate while attacking during cooldown.

How to reproduce:

1. Take a sword and spam-attack a Shulker.
2. Notice how the sweep attack does not activate if you attack before the cooldown is done.
3. Do the same thing with a Wind Burst mace. (Put a block above you so you don't fly away with each hit.)
4. Notice how the wind burst effect activates on these spam attacks even though the sword's sweep attack doesn't.