Bug with AoE abilities.

So, I was playing a game with Poppy and something weird is happening, as you can see in the video whenever something with AoE is used it spawns this weird white squares, the waves from the ward, Rengar's W, Zed's E and my Q all did this, and when we finally lost(this is irrelevant i suppose) the game, a huge white square appeared and started tickling for a bit. It is not gamebreaking, but as you can suppose it is pretty disturbing since you get a white light flash when this happens ( you can't notice this in the recording cos it is done with the phone). I hope you can fix this and thanks.

(Sorry for not showing with the other champs, but as u can imagine they where on the other team and the wouldn't stop to help me)(Yes, the Veigar wen't afk during the game)