The first flight of my Mavic Air was on June 18, 2018.
I've made 118 flights since that date.
Of those 118 flights, 107 (more than 90%) list "Map Loading" as the location, and seven (fewer than 10%) list either a location or, in two cases, "No GPS" (one of those flights was at night, though that doesn't explain the "No GPS" entry, the other was a very short test flight).
The entries that list a location are randomly distributed in the list, beginning with the very first flight in June and ending with my latest flight on November 5.
I don't see any pattern at all in the occurrence of "Map Loading". I also have no idea what "Map Loading" means. When I click on one of the flights that indicate "Map Loading", I wind up looking at a map of the proper area, and I can replay the entire flight as expected.
I'm looking forward to hearing about the experience of others, and especially looking forward to an explanation of what the heck "Map Loading" actually means.
Larry