Lee Sin Resonating Strike Bug? [GAMEPLAY]

Basically the bug is when lee sin activates his second q, the other player can flash at the right time so lee's q goes on cooldown and does not do damage.

I don't think this is intended functionality as flash doesn't have any form a cc to disrupt the q, it's like being able to dodge a Darius Ultimate by flashing out from under it when he winds up. The video is old, but the game functionality seems to still be the same.