Oh, that’s the old Line Length Monitor. Back in the teletype days, it’d beep if your comment ran past 80 columns. Mine used to beep so much the janitor thought we had a bird infestation.
There’s always some background enthropy on a forum, just nevermind and fix it if you feel like. People fat finger “flag” all the time as well. https://news.ycombinator.com/flagged
to me research takes a long time, and not just an hour or so.