[konsole] [Bug 415147] New: Turning on blur background in konsole under wayland displays the blurred content next to the actual window

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https://bugs.kde.org/show_bug.cgi?id=415147

            Bug ID: 415147
           Summary: Turning on blur background in konsole under wayland
                    displays the blurred content next to the actual window
           Product: konsole
           Version: master
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: garaba.florian at protonmail.com
  Target Milestone: ---

Created attachment 124476
  --> https://bugs.kde.org/attachment.cgi?id=124476&action=edit
Image of the bug

SUMMARY
Turning on blur background in konsole under wayland displays the blurred
content next to the actual window

STEPS TO REPRODUCE
1. Start plasma under wayland
2. Edit konsole's current profile to enable background blur and set some
translucency

OBSERVED RESULT
A new rectangular region appears next to the window with minor overlap with the
original, blurring the content underneath it. By moving the window around, the
blur region moves by a different amount, so it is likely to be due to some
offset error. Maximizing the window results in the desired effect.

EXPECTED RESULT
Blurring should happen 'under' the actual window

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.17.80
KDE Frameworks Version: 5.65.0
Qt Version: 5.13.2
Konsole Version: 20.03.70

ADDITIONAL INFORMATION

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