When I was started Utah USA I went to the map editor and in the mission group, it says there's a "Clone0". I click on it and I had to turn up my camera speed because it was so far away... So weird and when you press "TAB" it doesn't go to it. DEVS!!?!?!?! EXPLAIN!!!!
This only happens when you spawn another car and then save the map with that vehicle spawned. So just delete clone0, save map, and restart.