Lux E invisible

I just played a normals match against a Lux, and whenever she would E, you couldn't see the glowing ball of light. If she let it sit, you could see the red circle, but if she detonated it instantly, there was no way to know where it would end up.

So uh... not sure how this works, but I'd like to report that as a bug. I've also noticed that Mundo's cleavers are invisible in some of the games I play against him.