Mordekaiser's W is inviisble.

was just winning a game quite easily - then I bought Proto-Belt on Mordekaiser and his W became invisible for the entirety of the game, I never knew when it was on, who it was on, etc, etc.

Ended up losing due to this glitch, it's quite annoying, so I looked it up, apparently it's been a glitch since the beginning of May.

Is Riot planning to fix this bug? Or is it going to be like Xeraths' broken hitboxes for the rest of the game's life?

Really frustrated.