Teemo going into stealth breaks auto attack

Description: Teemo's passive isn't broken by auto attacking. If you are standing in auto attack range of an enemy and your auto attack doesn't land before you go into stealth the attack is canceled and you go into stealth. So it seems that the cancel action of his passive is only cancelled on-hit, but he goes through his full attack animation. This causes missed opportunity for attacks on enemy champions and last hits on minions.

Frequency: This occurs every time and is repeatable.

Solution: Make the action of attacking break his passive instead of waiting for the on-hit