[konsole] [Bug 457960] New: Flashing retangles when using transparency and blur

[postix]

https://bugs.kde.org/show_bug.cgi?id=457960

            Bug ID: 457960
           Summary: Flashing retangles when using transparency and blur
           Product: konsole
           Version: 22.04.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: postix at posteo.eu
  Target Milestone: ---

Created attachment 151356
  --> https://bugs.kde.org/attachment.cgi?id=151356&action=edit
Screen recording

STEPS TO REPRODUCE
1. Open Konsole
2. Choose Breeze color scheme
3. Set transparency to 25%
4. Check "Blur Background"
5. Open a context menu, which covers part of Konsole's window
6. OR open a menu item like  "Help"
7. OR open a window like "Help --> About"

OBSERVED RESULT
Behind the opened (context) menu / window a darker flashing rectangle appears.
Please see the screen recording.i

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20220813
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.5
Kernel Version: 5.19.0-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 580 Series

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