Taskbar thumbnails display an icon of the application, and not a preview of the window. Settings > Compositor > Keep window thumbnails is set to Always. Compositor is enabled. I have tried with all available rendering backends.
(available in About System)
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.57.0
Qt Version: 5.12.3
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series]
Can I have a screenshot please.
*** This bug has been marked as a duplicate of bug 332003 ***