I might have the same issue. I've just noticed that my shelter has disappeared. Tracing back through my saves I found the last save the shelter was still in and I figured out its disappearance was somehow related to my failed Transport mission from the Mining Space Industries 2 mod.
Apparently, when I destroy a car, the shelter disappears. Since @Ezarae has this issue when picking an AAI vehicle, I'd guess this is somehow related to the act of removing a vehicle from a surface.
Edit
I'm also playing with Space Exploration and AAI programmable structures & vehicles.