File previews not displaying properly

Yesterday I upgraded to Photoshop and Bridge CC 2018 from last years version. I also installed High Sierra on my Mac. I am currently working on layered files that are in 16 bit and in Pro RGB. They are about 400 M. Now when I save them as either a PSD or as a PSB the previews display as shown below. I have never encountered this before. Is this a know issue with Bridge CC 2018? Any idea how to fix this? I have re-saved the files a few times and that didn't seem to fix it.