SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Open any QT based application (e.g., Kate, Dolphin, etc) on Wayland. I presume you may need a multi monitor setup. My setup has three monitors with different resolutions, same DPI, one rotated 90 degrees. 2. Click on menu bar menu item OBSERVED RESULT Observe detached drop down menu, placed well away from its triggering menu item EXPECTED RESULT drop down menus are placed immediately below its triggering menu item SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.89.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
Known issue fixed in Qt already and backported to the Qt patch collection.