Hello,
I though there was a place to attach an image, but I don’t see it so I shall describe this the best I can.
On the page listed below the section 4×4 Suduko.
(I am using a 3 part column on all sections. The images are pretty close in size.)
The first image in this section super easy 4×4 puzzle disappears on a tablet and phone. No other image is being affected.
Odd, I didn’t remember making it a thumbnail. I didn’t see the thumbnail in the library either. I re uploaded and the issue seems to be fixed.
Thank you