https://bugs.kde.org/show_bug.cgi?id=456997

            Bug ID: 456997
           Summary: black screen when watching video in fulscreen using
                    webcord and vivaldi
           Product: kwin
           Version: 5.25.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: wayland-generic
          Assignee: kwin-bugs-n...@kde.org
          Reporter: matej.sta...@gmail.com
  Target Milestone: ---

SUMMARY
When I try to watch a video in fullscreen using vivaldi or webcord it first
shows a black screen, and then it shows the video (it doesn't pause the video,
audio still works and everything still works. It  also properly accepts
keyboard input like a shortcut to open the plasma program launcher or space to
pause the video). If I trigger ANY input event (touchpad, mouse, keyboard) like
move the mouse or pressing a key it will again trigger the bug and display a
black screen for a couple of seconds and then display what you would expect.

PS: It does not happen when I try it with firefox. 

STEPS TO REPRODUCE
1. Open webcord/vivaldi
2. Try playing any video in fullscreen

OBSERVED RESULT
Trying to display a video in fullscreen causes a 3-second black screen and do
so any input events.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.25.3
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.5
Kernel Version: 5.18.12-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD RENOIR
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: Zenbook UN5401QAB_UN5401QA
System Version: 1.0

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