Anivia Q bug

I play a lot of and there is an uncommon (once or twice per game) but extremely annoying bug where sometimes her Q will become invisible mid-flight and make it hard to pop at the right spot. I'm not sure if this affects enemies, but it certainly affects the player. This happens on Blackfrost as well as base skins. I've been noticing this for awhile but never thought to post about it.

Thanks.