SUMMARY STEPS TO REPRODUCE 1. Create a few new activities in activities switcher 2. Try to delete the created activity OBSERVED RESULT The delete button (-) does nothing EXPECTED RESULT The unwanted activity window to be deleted SOFTWARE/OS VERSIONS Linux/KDE Plasma: 5.4.3-arch3-1 (available in About System) KDE Plasma Version: 5.17.4 KDE Frameworks Version: 5.64.0 Qt Version: 5.14.0 ADDITIONAL INFORMATION
That's not a delete button, it stops the activity. To delete an activity, (probably too late to be helpful sorry), you need to go into system settings