According to Disney Cruise LIne’s website, the Disney Magic’s December 2, 2019 5-Night Very MerryTime Bahamian Cruise from Miami has been altered as compared to the itinerary when the sailing originally went on sale. The December 2nd sailing, at the time of publication, shows the scheduled stop in Nassau on December 3rd has been changed to a day at sea.
At this time, I have not heard of any official correspondence from Disney Cruise Line to guests or travel agents of clients booked on the sailing.
Thanks to two anonymous readers who shared the email from DCL dated September 18th, the reason for this change is that Nassau was inadvertently listed as a port of call for this sailing.