'My FlightAware' comes up blank


KADS is one of the airports I track in ‘My FlightAware’. Right now, ‘My FA’ shows KADS without a latest departure although the Airport Activity page shows a departure a bit over 3 hours ago.

Is there a time limit after which the ‘My FA’ goes blank? I would think it would show the last departure whenever it occured, even 48 hours ago if that were the case.