Created attachment 141007 [details] Screenshot SUMMARY STEPS TO REPRODUCE 1. Disable "Put session into stand-by" 2. Click on Apply 3. Go to different KCM and back 4. Enable Disable "Put session into stand-by" OBSERVED RESULT No combobox item is selected, KCM "apply" button becomes active and the undefined setting can be saved. EXPECTED RESULT Last set combobox item is selected. SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20210820 KDE Plasma Version: 5.22.4 KDE Frameworks Version: 5.85.0 Qt Version: 5.15.2 Kernel Version: 5.13.12-1-default (64-bit)
Can confirm.
This is fixed by Jakob Petsovits with https://invent.kde.org/plasma/powerdevil/-/commit/8babe3530c32feb60e982eccd92fe2341091858d in Plasma 6, which re-does the entire UI and doesn't suffer from this issue anymore.