[GAMEPLAY] Vayne basic attack problem on new update?

[GAMEPLAY] I don't know if it's just me, but in the new update, Vayne is experiencing some glitches. The absolute BIGGEST one is as follows:

When playing Vayne, especially in early laning.. Some of her basic attacks will not fully complete. In other words, even though the animation and sound will go off, the damage is not done to the enemy. This has happened several times to minions and champs alike and is super annoying when you are trying to last hit minions or champs with super low hp, and still try to make a quick escape. EXAMPLE: Vayne (lvl. 6) vs. Fizz (lvl. 6)... Fizz has maybe 30 hp all alone running toward a turret. I chase with Vayne, the sound and animation goes off so I run the opposite direction before the turret hits me.... It doesn't do any damage to him. In fact, he actually came back and killed me seconds later.

Please fix this, it is very annoying and changes games around quite a bit, considering that would have been first blood for my team, but instead Fizz got first blood.