Bug 404189

SUMMARY
The close button no longer closes the main window.

STEPS TO REPRODUCE
1. Open Kontact
2. Do whatever you opened Kontact for (read mail, calendar stuffs, to-do stuffs, whatever)
3. Click 'Close' button in upper right corner.

OBSERVED RESULT
Kontact main window does not close.


EXPECTED RESULT
Kontact window closes.


SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION

All child windows close fine, it's just the main Kontact window that doesn't respond to the close button.

Also, could someone please explain the Severity system.  Why is there a Normal between Minor and Crash?  If everything's normal, there is no bug, if there's a bug, it's certainly not normal.