Made a Heliport from scratch, now the Helicopter gets teleported to an nearby airfield when hitting "fly"

I made my first scenery, everything worked well, i exported it and it had no errors. When i want to spawn at my Heliport, it first places the Helicopter at my scenery as expected but when i click fly in the lower right corner i get instantly teleported back to an nearby airfield. What could cause this bug to happen?

Good morning ! when we want to create a Heliport, it is imperative to also create an airport with a runway reduced to the minimum in width and length and make it transparent translucent, and of course put a helipad and save, good construction.
you are lucky my sdk is completely to break