I asked once about one that got restored and got an explanation why they wanted it back.
(I had posted an image link that was part of a story that was about to be published, and so was asked to remove it.
But then it came back again later. But I was told that it was OK since the story was published by then.)
Another one I noticed came back I decided to let stay (rather than delete it again) because I gather the un-delete was because someone actually wanted it to be there and disagreed with my reason for removing it.
In any case, having noticed a few come back, I wonder how many others came back that I never noticed.
Not sweating it too much, just thought to let people know this happens sometimes.
Seeing this sort of thing makes me wonder if older posts are being edited or deleted too.