Layer mask not displaying correctly
Photoshop 24.1 running on Mac Studio, Ventura 13.3.1, 64 GB
As you can see, the layer mask does not display correctly, the only fix is to put a solid color underneath. And some times, it is the reverse, meaning the layer mask displayes correcly, but the mask icon in the Layer window is funky.
In addition, I had this same problem on my last computer, PS5 running on a Power Mac G5. Two completely unrelated machines separeted by more than a decade.... so bizarre.

