1200px CAA trying to force 1200px when source image is smaller

[psychoadept]

For example: https://beta.musicbrainz.org/release/a2e35cbc-3c5e-4096-8da5-025fb5dc99ce/cover-art

Clicking one of the images results in the pop-up getting stuck and never displaying an image, because there is no 1200px image available.