(Audio Bug) DJ Sona and Bullet Angel Kai'Sa

So a few weeks ago, I was playing a game as DJ Sona and I had Bullet Angel Kai'Sa as my adc, when I was near her, I was hearing some strange popping distortion noises over the game's music so i thought my game audio was bugged. I always mute everything in-game with the exception of the game's music so i can hear the awesome music by DJ Sona.

I tried changing between her forms, with the same result; weird distortion. This strangely does not happen when i was far from her or when she's not in the game. Anyone have had this issue lately?