I am not sure if its the DD DC landmarks or the airport. I will have to swap them to see what happens but when landing at this airport the performance just dips and its worse around the even when lights are on but its still quite bad during the day and this is especially with the CRJ and A32NX.Once I am parked and the plane is off its back to normal.
My GPU is not on the high end side but even turning my resolution down the issue is still there. Running a 10700k with a 2060super.
Not a big issue with other 3rd party airports maybe except KLAS from Flytampa.