SUMMARY It started with the update to 5.23. After selecting any option to leave (via Kickoff or right-click on a desktop) the resulting "Leave" screen (with a bunch of options like Sleep, Hibernate, Reboot, etc) which used to appear on both of my monitors now appears on the left one only, which is a smaller and not a primary laptop's screen. STEPS TO REPRODUCE 1. Described above 2. 3. OBSERVED RESULT "Leave" screen is shown on one monitor only. EXPECTED RESULT Such screen should be presented on all monitors. SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.23.0 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION I haven't found any notice of this in 5.23.1 changelog so it seems you missed this issue that's why I'm reporting it.
All clear. 5.23.1 has resolved the above.
*** This bug has been marked as a duplicate of bug 443787 ***