Hahaha now that I see it again I did notice this in game, and I thought about it quickly but kind of disregarded it. At least nothing came of it. If this Lee Q was the initiate on the game winning fight, that'd be messed. :P
Most likely a spectator bug. He probably actually hit it in game.
Introducing the wonky hitboxes of league!
Lux Q. Morgana Q. Lee Sin Q. Yasuo's Tornado. PROJECT: Zed Q. Leona E. And probably not wonky, but still so fucking cancerous, Anivia Q.