Have you entered the main room at all after this happens? There is a constant meta paranoia causing event on day 5 that won't stop until you do so.
If you are in 0.8.2, you can also type "debug events" into the console to check for all currently active entities/events to see what could be causing it so that you can report it, followed by "debug scrape" to try to get rid of them. This is meant to exclusively as a last resort for when something bugs out and there truly isn't any way to get rid of the meta paranoia. Stuff can break if you scrape events.