A good fix for now is to use the software X-Mouse Button Control (XMBC), on Windows 10 you will want to use 2.11 beta or newer. Create a profile for Spotify with scroll method changed to method 1 "SCROLL msg" or method 4 "Wheel Msg" with 1 line per scroll (customize to your liking). This brings spotify back in line with normal scrolling, and you can easily change it back once they fix it. Hope this helps.