Aurelion Sol sound bug

Heya, first of all, i apologize if this has been stated before.

There's this weird, sorta bug, that happens when Aurelion Sol is ingame. I think this has been around since 2-3 patches, not sure exactly. Basically, when Aurelion Sol uses Q and manages to hit an enemy champion (or dunno, generally when it detonates to enemies, being minions or champs), all sounds near that spell become really, really low in volume (even quotes !). All enemies spells have lower sound, while ASol's W becomes soundless. It's 100 % reproducable, at least in my games.

Is this an issue that happens only to my game? If so, how can i fix that :P