shapes appear in cc libraries with dark background

I have been using Capture with my iphone camera to create shapes for use in Illustrator and Photoshop. When the shapes are displayed as thumbnails in the libraries panel in either Illustrator or Photoshop, the part of the thumbnail that represents the background behind the shape is dark grey rather than white. This makes the shapes very hard to see. If I drag a shape onto an artboard, it displayes properly. Do others have this problem? Is there any way to make the backgrounds be white? I'm attaching a screenshot of my libraries panel in Illustrator. The the upper thumbnails are from Capture, the bottom two with white backgrounds were created in Illustrator. I am runnning Illustrator 29.3.1 on mac OS Sequoia 15.3.1