Kwin or widgets broken after update

I use 3 screens, each have it’s own tasklist and the window list is set to show only applications of the respective screen. Since latest kwin update no more applications are shown in window list except on primary screen. If I change the resolution of the respective screen the apps are back & shown in window lists of the additional screens.

A post was merged into an existing topic: Note: KDE 5.74.0-1 stuff & QT5 5.15.1-1 broken