SUMMARY STEPS TO REPRODUCE 1. start Wayland session 2. open amount of windows of a same app (Dolphin) enought to group them in plasma panel 3. open panel settings, click "Add Widgets..." button 4. drag some widget from the widget explorer (kalc, for example) to plasma panel 5. click the list of grouped windows OBSERVED RESULT Nothing happens. Click the list of grouped windows again: list of grouped windows shows up and closes quickly. EXPECTED RESULT list of grouped windows always shows up. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.15.2 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.1
I can't reproduce anymore. Operating System: Arch Linux KDE Plasma Version: 5.15.90 KDE Frameworks Version: 5.58.0 Qt Version: 5.13.0 beta3