This is on Xbox One, controller.
I got out of my rover to collect a resource and when I finished and turned back around, it was gone!
My rover was equipped with a seat and a wind turbine. It was attached to another rover which was equipped with two storage units (the ones that hold 8 each).
Unfortunately I was very far from my base when this happened and I suffocated. I dropped a beacon before I died. How close do I need to be to see the location of my beacon, because I can't see it from my base.