Upon opening, there is a small gap between the Spotify window and the taskbar which shows whatever is behind the window (in the first screenshot, it's the white line). If I minimize and then reopen the window, this line becomes black (as shown in the second screenshot), which is a little better but still quite noticable.
Solved! Go to Solution.
Just wanted to give a heads up that this was fixed in the 1809 update. If you're still experiencing this make sure you're running the latest version of Windows.