I'm using Version 0.18.6 (20.06.2017), Revision git-3737-31820066 on KaOS Linux with KDE. When I switch to another (virtual) desktop, QuiteRSS is gone from my screen and can only be found in the "hidden icons" of the tray. Is this a bug? FYI, I use a dual monitor setup.
In answer to myself: fixed it by Tools, Options, System Tray, Move to the system tray when closing QuiteRSS. Imho it's a bug that the app minimizes when switching desktops.
Unfortunately, I do not have the opportunity to check