Mind that this is a world that has been moved from Stable to Preview, so that may have caused an issue.
I had a save that is around 700 cycles in, and I launched my first Steam rocket. Satisfied as I was, I saved and shut down the game to take a break. But when I went back to start it again, the game just crashes, a blackhole ate it. Every single time.
Now, the saves the cycle before the rocket launch can be played perfectly fine, but the saves with the flying rocket does not work.
Launch a Steam Rocket. Save and shut down the game Start the savefile, crashes