Band-aid fix for the never acknowledged issue with Spotify's taskbar icon appearing on the wrong monitor in a multi-monitor configuration on Windows. 🙏
Q: How do I use this?
A: Download SpotifyTaskbarFix.exe from here (or compile it yourself!) and run the program at system startup with admin privileges.
Q: How does this work?
A: This thing is basically automating what you would do to make the taskbar icon move to where it should be: it moves Spotify's window from screen B where it starts in to the primary screen and back to B. This action is virtually instantaneous, so you won't even notice the window moving.
Q: Why does it need admin privileges?
A: Because it needs to know when the Spotify process starts, and this information needs admin privileges.
#1 #2: Community forum threads describing the issue and the steps to reproduce it.
#3: How to create a scheduled task on Windows to run programs at startup.
#4: How to run a scheduled task as administrator.