I flew yesterday after not having flown my Mavic Pro Zoom since the recent update. When I turned on the controller after updating, I received the message "NFZ Limit" on the screen. I've never received this notice before. I am 7 miles from the closest small airport but 2 miles from a hospital heliport. I was able to fly the drone as before but could not get rid of the "NFZ Limit" on the screen. Any thoughts on what this means?