When I start Spotify on Windows the volume slider always appears visually to be at full volume. In reality the volume is somewhere else when I start playing music. After the first time adjusting the slider since spotify started it works as expected. But it's very frustrating to have no reference when you adjust the slider for the first time. Often times the music will be way to loud. When I restart my Computer it's visually broken again. It is not broken when I simply close and reopen Spotify.