I was on the other day and noticed a sequence of images looked incomplete. I checked the source and found it was missing two images, so I grabbed them and uploaded them. I did my best to tag and following guidelines.
Surprised to find the posts deleted after getting on today, and curious I searched for the image to find it reuploaded by the user Cat-in-Flight.
I checked the reason for deletion, seeing the following: https://imgur.com/a/xukvZVy

The flag says inferior/duplicate, but the images are the same resolution from the same source, and were clearly posted first based on image number.