Problem with spawn at airfield (Single Player)

Airport is Desvres, it concerns ALL single engine hangars on it.

Currently my work around is to place objects into the hangars that prevents planes to spawn there

Here they spawn:


But now it is worse. They all spawn safely but as soon as they start their engines they are teleported over to the waters of the Channel where they do a dolphin jump and drown.


No, I am not kidding.



And here the hangars concerned (I guess the rest of the hangars produce the same results):