Teemo AA's don't cancel his passive upon activation

Title. Its the most annoying thing... you're sitting in lane, eyeing that cannon minion like "gimmie gimmie me wantz" and you hover your mouse over it instead of moving so you know you'll get it. "100 health... 90... 80... lets hit it! WHY DID MY AA CANCEL!" And you're invisible. Because instead of your AA canceling your passive as it should, instead your passive cancels your AA. Its also extremely annoying when you're sitting - or even moving, as the passive will activate even if you're moving - in a bush waiting to invis for that buff and realize that minion's health is depleting fast because its being focused- you try to AA, and it cancels. This needs to be fixed, it makes CS'ing much harder, and I realize moving around is a good part of the game but it also hurts when a smart melee enemy takes advantage of that knowledge and goes to move on you with a mobility spell just as you're going invisible, suddenly you miss that first autoattack and they might even win the trade because of it.

Its a small thing, Rito, please do it. Not sure if its a bug and this should be posted there, but it also affects gameplay so whatever.