probably because the AI didn't make it clear enough that the smaller version of Chester is supposed to be a plushie.
It seems like I could appeal it, but I don't think I would have much success, and the other images are still up.
I have backups of the art, so if more Chester art is gone, just feel free to dm me, and I send them to you, if I see the DM, which might take a few months, since Im not active.
Edit:
it was part of this post: https://civitai.com/posts/26541687
Im not sure if the entire post is gone, or just the one image in it.
the more sfw versions seem to have gotten a lot of attention, but those dont, so maybe the entire post is gone.