Taskbar and windows access deactivates temporarily

there is a general issue with kde i’m suffering from. from time to time the window-functions (minimize, close) can’t be activated and the icons in the taskbar can’t be used. it takes some time until they get back to function and can be used again. this happens on both of my systems, one is an amd-gpu with wayland and the other is a nvidia-gpu with X11.
any suggestions ? anyone with the same issue ?