SUMMARY *** When Minecraft initially launches, it opens up as a non-fullscreen window. During this time, the window makes an "imprint" of what's behind it and displays it. It sticks around, even after moving the window, until the game enters fullscreen. Video of the issue: https://youtu.be/ZOL2EjBSwio *** STEPS TO REPRODUCE 1. Position an easily identifiable window near the center of your screen. 2. Launch Minecraft OBSERVED RESULT The Minecraft window is transparent and windows that should be obscured are visible through it. EXPECTED RESULT The Minecraft window would start out as black instead of being transparent until it then transition into the red Mojang logo. SOFTWARE/OS VERSIONS Linux: 5.15.6 KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Nvidia driver 495.44 on X11
This bug was reported against an outdated version of KWin. We have made many changes since the. If the issue persists in newer versions can you reopen the bug report updating the version number.