You can try to log in under X11 and see if that makes any difference. It's probably a driver thing (of which I admit I have very little clue about) but this may be a workaround this for now.
To do that, you need to be logged in to your account and then log out. When you are at the login screen again, you should see a little wheel icon at the bottom right corner. Click on that and select the option that says "Zorin Desktop on Xorg", as shown in the screenshot from this post: