We’ve had this discussion before.
Even upon rereading that thread, I’m not sure if it was because, “OMG! Sock participated! Doesn’t matter how good the discussion is. Nuke it from orbit. It’s the only way to be sure.” or “It was an oopsie doopsie / software error and not worth the effort to fix it.”
If it really was the former four years ago, that might be the answer to your question.