[GAMEPLAY] Input buffer inconsistency on Alistar's heabutt

On targeted abilities like Alistar's heabutt, you can press W-flash instead of flash-W to cast your abilities faster after flashing.

It works most of the time but it sometimes fails to cast the ability you "pre-queued". I think I found a way to reproduce it.

Click behind the enemy so that your champion move towards it before inputting W-flash. The queued ability doesn't cast.

In every other cases : clicking directly on the enemy, clicking to the left or right of the enemy so that your champion moves towards it at an angle or clicking away from the enemy before inputting the W-flash produce the intended result.

I haven't tried to reproduce the bug on other abilities.

EDIT : Works with and without quickcast and with every targeted abilities I tried.