This happens with Content Cafe as well. It seems at some point the image for that cover was saved as a 1x1px image with a defined location as such:
https://test.nflibrary.ca/opac/extras/ac/jacket/large/r/5337
So it never hits the 404 to replace the image with a 'No Cover Image' option as it thinks this 1x1 image is it's cover.
This happens with Content Cafe as well. It seems at some point the image for that cover was saved as a 1x1px image with a defined location as such:
https:/ /test.nflibrary .ca/opac/ extras/ ac/jacket/ large/r/ 5337
So it never hits the 404 to replace the image with a 'No Cover Image' option as it thinks this 1x1 image is it's cover.