I’m wondering if you might have some 3rd party scenery, or other add-on, installed as you appear to have a road which I don’t have and you are missing the brick/rock wall below the fence, which I do have.
Only fbw 320 and twin otter. Nothing related with sceneries.
Looking at your image, it seems that it’s not a bad placement with the terrain (floating), but that it hasn’t loaded that part of the wall. I don’t know why.
I’m at a bit of a loss to explain this, maybe clear your rolling cache if you are using it and perhaps try the repair option for Flight Simulator, but I don’t really hold out much hope for either of those.
The road on the airport side of your fence seems like it’s probably linked to this but where it has come from is a mystery if your community folder is empty.
In the end almost sure I was missing that object, for an unknown reason, since as I said I don’t have scenery mods, I found this post for the installation to add back missing files.
The steam users have it easier using verify files integrity options.
I lost all the configuration and in the end it turned out it wasn’t my fault, but someone at Asobo came up with the brilliant idea to use an asset from another airport which I didn’t have installed (if I want to save disk space, I don’t plan to fly there, and they give me the option to install airports individually, why wouldn’t I use that option).