This happens if you are as a pilot, and you go a far enough distance from the center of the map (not sure how far, probably 12000 meters or so), you'll be brought back to the center of this map. I find this as a bug because if you are on an extremely large map, you'll get sent back to the center of the map if you are as a pilot, but otherwise, as a vehicle, you're safe.
This could mess up mods like epic. My suggestion is to change this to "uhoh, person out of map boundary, resetting!", if the person is 6000 meters or more out of map boundary, or even being able to change the out of world distance on a map's trn odf.