Some psd icons are either white or black in icon view of Mac finder

[Quackerback]

I am using PE 25.0 on a MacBook Pro running OS 15.4.1.  I make a lot of images in which I delete the backgound so that I just have an image of the person or object.  I search the images using finder in icon view to find the image that I want.  About one out of 20 of these icons show up blank in finder when in icon view.  If I created the image with no background layer, the icon will be white.  If I include a background layer of any color, the icon will be black.  If I switch to list view in finder, I can see the icon but it is too small to be useful.  I have tried deleting com.apple.finder.plist file and relaunching finder, changing the image in some way and saving a new copy and changing some of the finder view preferences.  Nothing helps.  Other ideas?

[Jeff Arola]

Do any of the psd files that show black or white in Finder have a layer mask?