So whenever I start up the game the sound levels are fine for a few minutes but after a while (as you can see in the gif) the sound levels start slowly going down until it reaches zero. If you try to raise the sound levels, they just go back down
https://gyazo.com/82f1aa05a19341d9af40b3a4775cd0f5
osu! version: 20171227.2 (latest)
https://gyazo.com/82f1aa05a19341d9af40b3a4775cd0f5
osu! version: 20171227.2 (latest)