Laminar has released a new X-Plane 11 update and I updated mine.
I have sent Laminar pictures of different random airports plus airports with helicopter pads before the recent update and after the recent update.
Helicopter start up scenery with the helicopters between building walls, next to building walls with house roofs directly above the helicopters rotors and rotors, Helipads where half of the helipads are inside of buildings or half cut off by a runway.
I never expected this from X-Plane seeing how many years it has been on the market.
Do a search with " Heli Pad"
Scroll up to the very first airport at the top of the list.
Launch the scenery, The helicopter pad is half cutoff by the airport runway.
Go back to the airport selection and randomly select other airports with heli pads and launch the scenery.
You should be experiencing what I am experiencing.
I am still experiencing problems with my helicopters on scenery startup up.
Thank you Sergio