Client: Champion Select drumbeat plays constantly once the game starts

When I play draft games (ranked 5s/3s or normals, doesnt matter) I get the background drum beat from the champion select playing constantly after it is over and the game starts loading. It will play continuously until the client is closed. Muting the champion select music will stop this or muting the client entirely will of course stop this as well, but I shouldn't have to do this.

It's not completely terrible, as oddly enough the drum beat kind of enhances the twisted treeline music, weirdly enough. but beyond that, it's really annoying to deal with.