It seems there is a slight chunking issue with the map of Orson's cabin.
To be more specific; I suspect the trees and rocks generation (which I assume might be a WFC based solution, correct me if I'm wrong) seem to be conflicting with the semi-static road generation of that map, and the overlap causes the game to be confused, and creates a bunch of blue ground tiles under the trees where that one chunk of forest tries to spawn ontop of the dirt road path, where the crossroad leading north and toward Orson's cabin is.
