It’s a scenery bug and it’s been well known since the patch. Asobo will be releasing a fix for it with the world update. That was supposed to be next Tuesday, but the update was pushed ahead by a week, so we’ll be seeing it in about 10 day.
You have 2 options for the time being:
- deal with the scenery defects
- install a mod at the link below that fixes said scenery irregularities. Note that if you go this route, you’ll have to delete that mod before the next update, as it could conflict with the fixes Asobo will put in place.