Thing is, they wander the desert in previously unexplored areas…
So I turned on the “Show Hearthlings path” setting, and followed it to… litteraly the end of the world.
See screenshot : https://drive.google.com/open?id=0B5zGvc3eClCVSmw4V2tJWlF1OEk
I supposed I have either misclicked or the engine misunderstood something and used 0 values, but apparently they are building a marketplace at the edge of the world… and I can’t cancel it.
Once they “place” items, they are not there, still ghosted, so I can’t even tell them to remove them.