Things won't show when dragged into 2nd monitor
So ... I'm on an iMac, using Big Sur 11.0.1 with a Cintiq Pro 24. I use the Cintiq as my main display with the dock.
This problem MAY have started with the Big Sur update ... when I try to drag a window from the Cintiq onto the Mac monitor, as I'm dragging it is visible (though transparent) as it moves into the Mac display frame. As soon as I let go of the cursor, the Mac's newly dragged window disappears completely. This includes Safari, Apple Mail, Finder, new Photoshop artwork tabs -- so far everything disappears except any of the Photoshop Navigator/History/Layers windows, etc. windows (I can drag them over and they remain fully visible).
Hopefully I've given enough info ... I'm mirroring the displays for now until I can get this resolved. Any ideas?
Thanks!!
iMac 27″, macOS 11.0