I run no mods, but have Using debug tools enabled, therefore I already knew that some maps are stacked above one another while they are mostly left and right, and I figured it wasn't that strange to have some neutronium lap over.
I speculate on it being an artifact of the crashed satelite being so far up the map(???)
Was able to reproduce it when I made a new colony with the same seed SNDST-C-1197511350-0
- Load a game with seed: SNDST-C-1197511350-0
- Go into orbid around the planetoid just 3 tiles to the bottom right
- view its surface and voila.
- load a new colony with seed:SNDST-C-1197511350-0
- hit backspace
- hit CTRL+F
- look to the right