https://bugs.kde.org/show_bug.cgi?id=465118

            Bug ID: 465118
           Summary: Sometimes, clicking trying to bring a window to the
                    front will instead open a new instance of that
                    application
    Classification: Plasma
           Product: plasmashell
           Version: 5.26.90
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Task Manager and Icons-Only Task Manager
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: 1.0

SUMMARY

Sometimes plasma gets into a state where when I click on something in the task
manager to bring an already running application to the front, it will instead
spawn a new instance of that application. This will happen for all running
applications -- it becomes impossible to switch to an already running
application (except via alt-tab).

Killing and re-starting Plasma fixes this. I've had this happen both
immediately after login, and when the desktop geometry changes due to a screen
being (un)plugged.

This only started happening when I switched to Wayland -- but that came with a
big system update so it's not clear which of those changes started this.


STEPS TO REPRODUCE
1. With some applications (Firefox, Thunderbird, Konsole) running, click on one
of their icons in the task manager


OBSERVED RESULT
A new instance of that application is being started.

EXPECTED RESULT
The existing window should be brought to the front.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 
KDE Plasma Version: 5.26.90
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-2-amd64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Xeon® CPU E3-1505M v5 @ 2.80GHz
Memory: 31,2 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics P530
Manufacturer: LENOVO
Product Name: 20ENCTO1WW
System Version: ThinkPad P50

ADDITIONAL INFORMATION

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