Sometimes I see them visibly flying in and as I turn to watch them land --they disappear.
Other times, they land, turn and the pilot pops out and walks around the ship. I approach --and both the ship and pilot disappear.
Yesterday, on planets, every time I tried following a pair of npc ships hoping they would lead me to a Landing Pad or a Trade Post, I would get close enough to see the ships (rather than just their trails) --they disappeared.
This has been happening for the last two days whether or not I am grouped with someone…