Bug 496292

Created attachment 175835 [details]
Demonstration video showing context menu failing to open intermittently, using a new user account

SUMMARY
Right-clicking on entries in the Icons and Text Task Manager, intermittently fails. Dwelling on the entry before clicking seems to prevent the failure.

STEPS TO REPRODUCE
1. Right-click task manager entry (be quick)

OBSERVED RESULT
Nothing

EXPECTED RESULT
Menu

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8
Qt Version: 6.8

ADDITIONAL INFORMATION
This is new, so I looked at what changed recently on my system. Perhaps there's a correlation.

Some 2-3 days ago, I upgraded KF from 6.7 to 6.8. I feel like there's a strong chance I'd have noticed this sooner, if it were that - although different apps seem to be more reliable; plus, I'm injured, thus slow, and this is time-sensitive... so it's possible I just didn't see this behaviour until now. 

Another recent change was to qt6-declarative, related to https://bugs.kde.org/show_bug.cgi?id=494804 I'm not sure that there is any correlation or not, here, I just thought it might be relevant so I should mention it.

Thanks for any help.