SUMMARY Since 6.0.5, launching any kind of application results in the app's windows always being visible on all activities. This was not the case on 6.0.4. In addition, windows can't be moved to other activities anymore. I've already reported BUG #483148 in the past, which broke moving windows to other activities via plasma's task manager when trying to move the window for the first time. This one is now fully broken. STEPS TO REPRODUCE 1. Have more than one activity set up 2. Don't have any special window rules defined 3. Open any kind of application 4. Switch to a different activity OBSERVED RESULT Application window is always visible on all activities and can't be moved / set to a specific activity only EXPECTED RESULT The application window should only be visible on the current activity, unless a specific window rule was applied SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux KDE Plasma Version: 6.0.5 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.1 ADDITIONAL INFORMATION This was not the case on 6.0.4. Downgrading temporarily solves the issue.
Looks like this was a build issue on my end. I've re-built everything and the issue is now gone. It didn't even make sense considering the commit histories of all the repos involved (kwin / plasma-workspace, and dependencies). Sorry for the unnecessary noise.