Created attachment 144667 [details]
The application that remains in Task Manager after the activity was changed.
After you switch the activity using the keyboard shortcut, a 'Plasma Workspace' application appear in the Task Manager. This behavior is sporadic.
STEPS TO REPRODUCE
1. Have at least 2 Activities
2. Switch between those activity using the keyboard shortcut.
Sometimes, a Plasma Workspace opened application remain present in the Task Manager.
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2
*** This bug has been marked as a duplicate of bug 443968 ***