That has to be the wrong stock image included or something, bloody hell.

     magick image-l.webp image-r.jpg -compose difference -composite -auto-level -threshold 30% diff.png

It's practically all dark except for a few spots. It's the same image just different size compression whatever. I can't find it in any stock image search, though. Surely it could not have memorized the whole image at that fidelity. Maybe I just didn't search well enough.

This is hilarious. Seems like kind of a random image for a model to memorize, but it could be.

There is definitely enough empirical validation that shows image models retain lots of original copies in their weights, despite how much AI boosters think otherwise. That said, it is often images that end up in the training set many times, and I would think it strange for this image to do that.

Regardless, great find.

Given the recency of that image, it is unlikely it is in the training data and therefore I would go with oversight.