SUMMARY I have some applications sometimes do not "stay" on the assigned Activity. When switching to the next Activity (using a keyboard shortcut), the window with focus is still visible in the Activity I switched to (the application does not have this Activity selected in "Show in Activity") STEPS TO REPRODUCE 1. Setup two activities: "Work" and "Fun" 2. Change to Activity "Work" 3. Start Firefox and assign it to only "Show in Activities: Work" 4. Change to Activity "Fun" OBSERVED RESULT Firefox window is still visible after switching to "Fun" Activity. When the issue occurs I can open the context menu on windows title bar. Hover over "Show in Activities" (to see the selected values) and close the context menu (do not change anything, just open it and close) After that the Firefox window disappears from the Activity (and can be found in it's Activity -> "Fun") EXPECTED RESULT Firefox window should not be visible after switching to "Fun" Activity. SOFTWARE/OS VERSIONS Operating System: Fedora Linux 41 KDE Plasma Version: 6.3.3 KDE Frameworks Version: 6.12.0 Qt Version: 6.8.2 Kernel Version: 6.13.8-200.fc41.x86_64 (64-bit) Graphics Platform: X11 Processors: 12 × Intel® Core™ i7-10750H CPU @ 2.60GHz Memory: 31.1 GiB of RAM Graphics Processor: Quadro T1000 ADDITIONAL INFORMATION - This issue started occurring after some upgrade, but I can't say from which exact version - The issue is reproducible most of the time with Firefox, Chrome and krusader. When this occurs I tried the same scenario with konsole, but it works properly. - The issue seems a bit random, sometimes it works and I can't reproduce, sometimes it occurs on every Activity switch - When a window from a different Activity is displayed the Icons-and-Text Task Manager does not show it - Icons-and-Text Task Manager Settings: Behavior > Show only tasks: From current desktop: enabled From current activity: enabled - Widget "Show Activity Manager" does not seem to work, selecting an Activity there causes a quick switch to it, but then it goes back to the previous one During Activity switching user journalctl shows this log entry: ``` kwin_x11[9044]: kwin_core: Failed to focus 0x1200011 (error 8) ```