Created attachment 119415 [details]
screenshot of the fail report

SUMMARY


STEPS TO REPRODUCE
1. Open discover > open "Updates" (Aktualisierung)
2. wait until all vacant updates have been found 
3. press "update all" (Alles aktualisieren)

OBSERVED RESULT

the authentication dialogue window shows up in the middle of the screen but disappears again within a fraction of a second leaving no chance to enter the password for authentication.

then a notice window appears saying that the update could not be done.

"You have no authentication to proceed this action"
"Failed to obtain authentication"

EXPECTED RESULT

The dialogue window would normally appear and I would enter the Password to obtain permission and do the updates

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION