@Riot Lux E invisible

I have no idea how it is triggered. All I know for sure is that I run into it on occasion and it is really hard to see. The circle around it is still present and the sound as it proceeds to go off is still there, but the effect itself is almost invisible. I read in a few threads that sometimes all her spells are invisible. I have only run into this with the Classic Skin Lux, no other. There are a ton of threads about it when I searched it, but it doesn't seem like anyone has noticed. If I gain more knowledge and common factors to the games I have seen it in, I'll update this thread. All I can say is that I'm pretty sure it is when there are 2 Luxes in game with the classic skin. Don't know if it activates if one Lux has a skin or not as I have yet to see a game with those conditions.

If anyone has any information on how it happens besides what I said, please let me know. I'll add it to the main discussion for Riot.