[GAMEPLAY] huge Hail of Blades bug on MF

I've created a thread about this before, but I've finally figured how to reproduce this bug specifically on MF since I'm not sure if it happens on others (it happened to me on Ashe but I think I was just using my Q as an auto reset on champions which doesn't count as a HoB activation).

Here's the bug in normal speed, clearly obvious in practice tool: https://streamable.com/agdf2

As you can see, HoB does not activate on the first auto, and in real games it can really ruin your DPS and the whole purpose of running this keystone.

How to reproduce: It happens when you press W as you're charging up your first HoB auto. It could be that for some reason it's counting it as an auto reset, but MF does not have any sort of auto reset in her W (nor Q even) so this is 100% a bug. Also for clarification, MF's passive is not related to the bug, as it can happen on both passive-ready champions and those with passive already hit on them.

Here it is in slow mo if you're interested in that: https://streamable.com/xw658

And here are a couple clips where this bug happened in-game: https://streamable.com/wais6 https://streamable.com/ml5hb

Riot please fix your crap, HoB is one of my favorite keystones on MF and I pretty much can't use it now because this shit happens at least once every game and it can put me in really bad situations..