Managed to capture a good screenshot of the runway issue when using chase mode (F3 key).
As can be seen it copies the grass area (or sand at the desert airports) and places it on the runway,
Every 3D airport I tested has the issue except for Flight School.
If I spawn the model on the runway and move it slowly back and forth there is not a problem, but as soon as I hit the F3 key you can see the intermittent grass\sand follow the model, happens with helicopters too.
I am using the Intel I7-13700 CPU with IGPU only, (removed my RTX 4080 GPU for testing the DX11 Beta).