I just landed on Yuckano (the tungsten volcano asteroid) with a scout rover. I had to search around for a bit until the map wasnt all black.
I had almost no visible tiles on the surface, so I just clicked on a valid placement for the scout rover, which led to this floating scout rover lander
- visit the fourth asteroid (the one with tungsten volcanoes) with a scout rover module
- see that the surface is not visible
- place lander in the air / on top of unknown tiles