SUMMARY If the user tries to suspend an activity and an application in that activity requires user intervention before quitting (e.g. there is an unsaved file), the activity suspension appears to succeed (according to the state displayed in the switcher), but the programs in that activity still remain open in the background. STEPS TO REPRODUCE 1. Open a text file in Kate 2. Edit the text file, but don't save 3. Switch to another activity 4. From the activity sidebar, suspend the activity Kate was in OBSERVED RESULTS The activity disappears from switcher but it is still running in background. This can be confirmed by looking at the list of applications in the system monitor EXPECTED RESULTS If an application requires user intervention before quitting, the user should be taken to that window and then the activity should be properly suspended. SOFTWARE VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.24.90 KDE Frameworks Version: 5.94.0 Qt Version: 5.15.4 Kernel Version: 5.15.43-1-lts (64-bit) Graphics Platform: X11 Processors: 4 × AMD EPYC-Rome Processor Memory: 1.4 GiB of RAM Graphics Processor: virgl Manufacturer: QEMU Product Name: Standard PC (Q35 + ICH9, 2009) System Version: pc-q35-5.1 ADDITIONAL INFORMATION Also reproducible on Plasma 5.24.5