[GAMEPLAY] Vayne Q bug

This only seems to happen early game, but when I use Vayne Q, and try to hit a minion, it does the same amount of damage as a normal auto attack. So far I've experienced this in 2 games, and 2/2 times I was running fleeting footwork. Like I mentioned, only seems to be an issue against minions in early game, but it is for sure actually happening. Regular auto will hit around 78-80 damage early game, and tumble should be much more than that, but clocks in at also 78-80 damage on minions. This is kinda annoying for last hitting (especially because I suck at it anyways) and really messed me up in a ranked game. Not sure what else to add, so thanks!