No preview in Taskbar in Plasma 5.21 Wayland

Since the update to KDE Plasma 5.21, preview images no longer appear in the task bar.
There are also problems with the right-click menu, it always closes by itself.

Does anyone know a solution?
Have already changed the compositor.

Everything works normally on X11.

Ok its a bug in plasma. Same situation in kde neon. The thing with the preview window got fixed with plasma 5.21.1

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