Quickly, it's a mission to Duna with two pieces, a rover and leg-lander. They detach high over Duna while on a course to aerobrake with about 10km periapsis, starting at around 4000m/s, and are meant to land with parachutes plus engines. They're also far enough apart that I can't use [ or ] to switch between them, Flying either ship I discover that shortly into aerobraking, the other has disappeared from map view. Also, flying either ship, I find that they both don't actually aerobrake enough to land the first time around. So I know for a fact that neither ship could crash without firing engines first. Even then, they disappear way before impact would have happened, it's as if they're crashing into the atmosphere and dying. Is there a height limit that the game just considers impact for ships you aren't flying? Would it help if I got them within render/physics distance before aerobraking?