SUMMARY Layout switching set to Alt+Shift breaks Alt+Shift+Tab shortcut for reverse navigation through windows. STEPS TO REPRODUCE 1. Set the Reverse Navigation Through Windows shortcut to Alt+Shift+Tab 2. Select Alt+Shift as a Switching to another layout shortcut 3. Open multiple windows 4. Press Alt+Shift+Tab OBSERVED RESULT 1. If the forward navigation through windows set to Alt+Tab: Alt+Shift+Tab firstly switches the layout right after the combination Alt+Shift is pressed then after the Tab pressed and released(while Alt and Shift are held pressed) KWin switches windows in a forward direction. 2. If the forward navigation through windows is assigned to other combination, e.g. Alt+F12: Alt+Shift+Tab only switches the layout right after Alt+Shift is pressed. EXPECTED RESULT Switching layouts by Alt+Shift and switching windows backwardly. SOFTWARE VERSIONS (available in About System) KDE Plasma Version: 5.13.5 KDE Frameworks Version: 5.50.0 Qt Version: 5.11.2 ADDITIONAL INFORMATION Probably changing an event type for layout switching from "key pressed" to "key released" could solve the problem.
I can reproduce on my system. Operating System: Arch Linux KDE Plasma Version: 5.14.1 Qt Version: 5.12.0 KDE Frameworks Version: 5.51.0 *** This bug has been marked as a duplicate of bug 392961 ***