Based on this moment in the Gartic Phone collab on Jan 20, 2022.

Anyone has noticed takedown requests break pools? For example at least as the date of this comment, Nightme Fuel's previous image from here reachs a dead end and you can't browse any previous images.

rom_collector said:

Anyone has noticed takedown requests break pools?

Danbooru has a forum for discussing site-wide issues, you know. Someone already mentioned this there yesterday, and an issue was opened for it on Github.

A forum? Oh right! I think I've been there like three times in ten years. I recall it looks like a browsing nightmare let alone search for anything specific, even tough I'm used to Usenet (another browsing nightmare). Imagine my surprise now to find out there is a github repository. ^_^U