Created attachment 130093 [details]
Pinned system tray applet is shown in the Task Switcher, but it shouldn't, because it's not a regular desktop window.
STEPS TO REPRODUCE
1. open system tray applet
2. click on pin button in the top-right corner
3. open Task Switcher (usually using Alt+Tab shortcut)
The popup is shown in the Task Switcher
The popup isn't shown in the Task Switcher
Linux/KDE Plasma: KDE neon 5.19 User Edition
KDE Plasma Version: 5.19.3
KDE Frameworks Version: 5.72.0
Qt Version: 5.14.2
Hah! Can reproduce. Not sure if this is a regression if just something I never noticed before.
Also not sure if this is the System Tray's fault, or KWin's fault.
This isn't just the System Tray, it seems to happen with all panel widgets' pop-ups. Moving to KWin.
Possibly duplicate of bug 419239
I agree with the comment 3: this bug is definitely duplicate of bug 419239. Also enabling "Synchronize skip switcher with taskbar" works for me too.
*** This bug has been marked as a duplicate of bug 419239 ***