Sound plays when client is minimized

When I'm in 5v5 draft queue, I like to minimize league and do stuff on other sites. Such as watch Netflix. I used to hear no sound when I minimized it, and the game would automatically pop up when it was my turn to do something so I didn't have to worry about forgetting to lock in. Now when I minimize it, it's quiet for a couple seconds and it starts making a low battle drum music. Can this problem be fixed?

Thanks!

• HomosexualWaffle