https://bugs.kde.org/show_bug.cgi?id=522510

            Bug ID: 522510
           Summary: Task Manager leaves empty transparent gaps after
                    closing applications in Plasma 6.7.2 (Wayland)
    Classification: Plasma
           Product: plasmashell
      Version First 6.7.2
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Task Manager and Icons-Only Task Manager widgets
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: 1.0

DESCRIPTION
Since updating to Plasma 6.7.2 under Wayland, closing an application from the
Icons-only Task Manager (or standard Task Manager) occasionally leaves an
empty, transparent ghost gap in the panel, showing only the panel background.
The panel layout does not recalculate or shrink to close the gap until
plasmashell is restarted or KWin is reconfigured.

STEPS TO REPRODUCE
1. Open any application (e.g., Dolphin, Firefox, Konsole).
2. Close the application normally.
3. Observe the Task Manager area on the panel.

OBSERVED RESULT
The application icon disappears, but the container space remains empty, leaving
a transparent gap with just the panel background color.

EXPECTED RESULT
The Task Manager should immediately recalculate the layout, shrink the
container, and close the gap.

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS  
KDE Plasma Version: 6.7.2
KDE Frameworks Version: 6.27.0
Qt Version: 6.11.1
Kernel Version: 7.0.14-arch1-1 (64-bit)

ADDITIONAL INFORMATION
- Graphics Platform: Wayland
- Processors: 12 × Intel Core i7-8700K CPU @ 3.70GHz
- Graphics Processor: AMD Radeon RX 7700 XT
- Monitor: LG 27GP750-B (High refresh rate)
- Temporary workaround: Running `plasmashell --replace` or triggering a KWin
reconfigure (`busctl --user call org.kde.KWin /KWin org.kde.KWin reconfigure`)
forces the panel to redraw and closes the gap immediately.

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