15
When closing Spotify in i3wm, the program closes instead of minimizing itself to tray
(lemmy.dbzer0.com)
A community for everything relating to the GNU/Linux operating system (except the memes!)
Also, check out:
Original icon base courtesy of lewing@isc.tamu.edu and The GIMP
See if Spotify supports X11's WM_DELETE protocol, if it does not then that could be the cause.