[Gameplay] Graves auto attack not registering

So I've played probably between 100-200 games on Graves since his update and have noticed a bug with his auto attack. Occasionally the auto attack will consume a shell yet trigger no animation or apply any damage. I've found this bug occurs at least once every game and I've had it happen against minions monsters and champions alike.

I've noticed a couple other bug reports expressing the same problem from almost 3 weeks ago. Has there been any progress made in identifying/recreating this bug?

Thanks BaggyJ