Created attachment 150904 [details] how does the "trail" look like SUMMARY Closing window with ALT-F4 when I made it transparent by dragging makes it impossible to remove the trail of the window STEPS TO REPRODUCE 1. Enable half-transparency in KDE setting, to make windows transparent when you drag them around 2. Drag any window to make then transparent 3. Use ALT-F4 to close then while dragging OBSERVED RESULT "trail" of window is left behind EXPECTED RESULT It should not leave the trail SOFTWARE/OS VERSIONS Linux/KDE Plasma: Neon 5.25 / Plasma 5.25.3 (available in About System) KDE Plasma Version: 5.25.3 KDE Frameworks Version: 5.96.0 Qt Version: 5.15.5 ADDITIONAL INFORMATION My friend also has this issue, and he discovered it first
Looks like the distro's Qt backport collection may be out of date. *** This bug has been marked as a duplicate of bug 439815 ***