This is the reason:
Looks like the PieFed’s old post deletion does not take into account whether a poster is local to a deleting instance or external to it.
At least one banger of mine on this comm is already affected.
Memes on piefed.zip should be safe.
Save on space. It’s set up on a community-by-community basis. It’s turned on for a bunch of meme communities on piefed.social and some caustic ones.