Same situation. Single large monitor with a "sidebar" for exported panels and the entire area (not just the MDFs) seems corrupted, in fact any graphic that appears on that area, eg: NVidia Overlay, also gets corrupted.
The issue appears to be that the frames are kept instead of resetting, thus the exported area starts to become crowed with all the frames overlaid on top of each other.
I took a screenshot but it also got corrupted, but it still shows (on the left) the F16 MDF logo that appears when it boots + the menu that appears after boot.