SUMMARY If we click the 'home' button (in the sidebar) to leave the screenlocker KCM, System Settings seems to forget any unapplied changes made by the user (and does not ask whether to apply/discard). STEPS TO REPRODUCE 1. Go to 'System settings > Workspace Behaviour > Screen locking' 2. Change any setting (but do not click 'apply') 4. Click 'back' (in the sidebar) 5. Click the 'home' button (in the sidebar) 6. Exit (close the window) OBSERVED RESULTS The user is never asked whether to apply/discard changes; the unapplied changes are automatically discarded. EXPECTED RESULTS System Settings should ask the user whether to apply/discard changed settings. This can happen while exiting the relevant KCM, which is already the behaviour exhibited by, for example, kcm_workspace. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.22.0 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
Confirmed. It appears to be anything in a multi-layer category when going to home doesn't unload properly. There's a related bug that after clicking home and clicking workspace behaviour "screen locking" is selected but it isn't the tab shown.
*** This bug has been marked as a duplicate of bug 419592 ***