i have this little trouble too with my msi 285 1 Go
i change my fasion and i find solutions ...
Before i launch clone1, clone2,clone3,clone4 and the main
if i launch the main first, it s better

the other way is the resizing of the main windows screen, if you move a little, you ll see that at one point, the screen ll stop the artefact.

with these 2 solutions, it s good now on my computer