[kde] [Bug 440068] New: Application vanishes then reappears while being started

[Michael]

https://bugs.kde.org/show_bug.cgi?id=440068

            Bug ID: 440068
           Summary: Application vanishes then reappears while being
                    started
           Product: kde
           Version: unspecified
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: solebanana at yahoo.co.uk
  Target Milestone: ---

Created attachment 140213
  --> https://bugs.kde.org/attachment.cgi?id=140213&action=edit
Log file from log viewer

SUMMARY
On starting application, icon bounces and entry appears on task bar, which is
fine. However then they vanish leaving no trace and there is a pause before the
application actually starts.


STEPS TO REPRODUCE
1. Search the application launcher for Firefox (this is the one where the delay
appears most pronounced, though it does also happen for other applications)
2. Start Firefox.
3. 

OBSERVED RESULT
Firefox icon bounces around ten times at mouse location, and Firefox entry
appears on task bar. Both vanish at the same time. There is a long pause, and
then Firefox reappears. The length of the pause varies depending on which
application is being started. This may be intentional, but it looks more like a
bug.


EXPECTED RESULT
Task bar entry and possibly also bouncing icon stay as is until the application
actually starts.


SOFTWARE/OS VERSIONS
Windows: 10, but not using it at present
macOS: OSX 10.10.5 or thereabouts, but again not using it at present.
Linux: Ubuntu 20.4
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

ADDITIONAL INFORMATION
See attached log.

Can't find a way of attaching more than one attachment so unable to include
dmesg.

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