Most likely that autofix was just caused by a scenery reloading. Next time you face the issue you can try to use teleport option (to anywhere and back to the coordinates of the airport). When you teleport outside the currently cached area a reloading is forced as well.
You just need to go a few kilometers away, not to another country. You can also force teleport via external apps which sopport it (e.g: Flow or Plan-g).
Cheers