Created attachment 124346 [details] A window on the left, secondary screen. And then just moved to be displayed on both screen. (The preview in the desktop switcher does not show the window on the primary screen.) In 5.17.3 and before, the desktop switcher displayed windows of all screens on the preview. In 5.17.4 only the windows on the secondary screen are displayed. A window overlapping both screens will only be displayed on the desktop switcher with the part that is visible in the secondary screen. plasma 5.17.4 / frameworks 5.64 / qt 5.12.5
*** Bug 414935 has been marked as a duplicate of this bug. ***
Updated to frameworks 5.65 yesterday. Now it works again for me.
Yes, seems to work for me as well.