[GAMEPLAY] Gangplank's Q goes on cooldown when canceled

Gankplank's Parrrley is bugged since 7.22 at least (this is the earliest that I noticed it). The ability will go on cooldown even when it is canceled (ie. the animation stops before the projectile fires.)

1. Create a custom game, pick Gangplank.
2. Level Q and go to a lane.
3. Wait until the last possible moment (or within a few frames) to Q a minion before it dies.
4. The animation will be canceled before the projectile fires but the ability will go on cooldown anyway. Bonus steps:
5. Be silver and think this isn't a bug.
6. Pick Pantheon and repeat the same steps. Q won't go on cooldown.
7. Be GP in ranked and try to Q a barrel open field and get denied by the enemy AD. Now Q is also on cooldown. Cry. Lose. Don't pick GP again.
8. Hope the Pantheon rework isn't also a wanton deletion of the previous champion.

Sorry for memeing out on this bug report but it's definitely not working as it should be and very annoying. Coming from someone with ungodly thousands of GP games played both pre and post rework.