SUMMARY
I just discovered that the task bar item of Systemsettings contains two or three custom “Action” items. Namely some (seemingly?) random items from the settings hierarchy.

First a general question: how is decided which actions are shown here? I could not see any pattern. Is this a “take me anywhere” feature? When I first experimented with them, the one I selected changed after I used it. But after a while, they did not change anymore and are always the same three: Energy saving mode, Login screen and Global design.

Now to the actual issue: when I select one of these actions, systemsettings switches the view to that kcm. But the menu on the left is not fully updated. The leftmost column changes, but not the next one. For example: one time I had “Touchpad” as an item. I selected it, the systemsettings window came to the foreground, the touchpad kcm was shown and the left-most column switched to “Input devices”. But the submenu in the second column had the first item “Keyboard” highlighted, not the “Touchpad” one, which was the fourth in the list.


In one instance of those trials, the systemsettings window opened and was filled with one solid dark grey colour in the area where the menu columns would be. Only the kcm content was visible. Hoping I could reproduce it first, I did not screenshot it right away, but then was not able to reproduce.


Operating System: Arch Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
Kernel Version: 5.15.5-arch1-1-surface (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Pentium® CPU 4415Y @ 1.60GHz
Memory: 7.7 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 615