It might be worth reading this previous thread which suggests a potential issue that existed a while back.
I have no idea what the current site settings are for “trust level required to hide posts” and I’m not a moderator of either of the places where posts were hidden, so I can’t comment on exactly what happened, and I don’t think it would help to speculate. Maybe try and ask " forums-governance" by direct message or mentioning them after “@” in this thread?