[Breeze] [Bug 423293] New: Toggling Hide Window Border off and on via keyboard shortcut makes Breeze decorator shadow appear far down from window

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=423293

            Bug ID: 423293
           Summary: Toggling Hide Window Border off and on via keyboard
                    shortcut makes Breeze decorator shadow appear far down
                    from window
           Product: Breeze
           Version: 5.19.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: window decoration
          Assignee: unassigned-bugs at kde.org
          Reporter: andydecleyre at gmail.com
  Target Milestone: ---

Created attachment 129557
  --> https://bugs.kde.org/attachment.cgi?id=129557&action=edit
Video demo

SUMMARY

Using the global keyboard shortcut for Hide Window Border twice, first hiding
it, then bringing it back, results in the Breeze decorator's shadow missing its
mark by about (exactly?) the height of the titlebar, down below the bottom of
the window.

STEPS TO REPRODUCE
1. Use Breeze window decoration
2. Use keyboard shortcut to Hide Window Border, on a floating window
3. Use shortcut again, to bring the border back

OBSERVED RESULT

The bottom shadow is significantly below the bottom of the window. The problem
disappears when the window is moved by hand, but remains if the window is moved
by packing.

EXPECTED RESULT

The shadow looks the same before and after using the shortcut twice.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.19.1
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0

ADDITIONAL INFORMATION

See attached video

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