So I'm flying my transport from my starting planet to a second planet. Midflight suddenly it vanishes and says it died along with the unit was holding. This didn't happen during my moon trip at all. The first time this happened I thought it was just a fluke. That was because you know was holding was unimportant, just a builder. Now my second flight to that planet succeeded and landed the unit that I started building a base. Now my Moonbase at this point was building thrusters so I could crash into the planet. So obviously I wanted to evacuate my commander to one of the planets that wouldn't be involved in the death and destruction. Halfway through the flight my game ends. It came as a surprise to me because apparently I died when all my bases were intact. But since the ship included my commander he died mid flight. This happen to anyone else?
When the Astreus is flying on the sub-orbital layer, it can get shot down by fighters. When it is in the orbital layer, it can be shot down by Orbital Fighters. So there are a few points of vulnerability where it can get shot down. That may be why you lost it.
The problem was it wasn't in either it was in between the two planets at the time. It was in transit between my primary and the secondary planet.