If you look at the local version of the post at https://piefed.social/c/tesseract@dubvee.org/p/2232597/addressing-the-elephant-in-the-room, it has accepted a comment despite the original at https://lemmy.world/post/49817942 remaining locked. I do not see any comments on e.g. piefed.ca so the comment may not have federated.

Isn’t this a bug? It’s definitely going to be confusing to people, so I thought I would let you know! :-)

Edit: added details to title that the post was remotely locked on Lemmy, as opposed to locally or remotely on another PieFed instance.