White Square Appears and can't gid rid of it.
A white square has appeared on my file and I can't get rid of it. Stays when I zoom in or out. Still there when I open and close. I tried to saving a copy in a different format (Tiff) and it's still there. I spent many hours retouching this scan. I can rescan that area and align and match the color - but it's a hassle. Wondering if there is an explaination for why this happened or how to fix it?
I'm on an iMac, IOS 12.4, Photoshop 23.4.2 (just updated. Was using the release just before this one when the problem occurred.)

