The game saves a rewind-gamestate whenever entering a new star system.
Jumping outside the safe jumprange as a last-resort-option may result in the ship taking critical damage and exploding before the game gets saved.
The rewind function would then load the game in which the ship immediately explodes.
The player is then unable to choose any other savegame to rewind to - for example the last pre-jump-encounter or similar.

A possible solution might be to only save the game to 'auto' on entering the system.
Whenever the game attempts to save to 'auto', it should first compare the current starsystem with the one of the 'rewind' file - if the dont match, the last auto should be copied to 'rewind', before progressing to the normal auto-save.

The way it seems to work now is, the game saves a rewind upon entering the system and there is no possibility to rewind to the last 'auto' or anything else.
Basically it is fine as it is now and no real bug, but the current workings can negate the purpose of picking 'adventure'-difficulty as it is now, since in the above described sitation, there is no real possibilit of a 'rollback' at all (and I doubt the majorit of players backs up the save files manualy in case the above happens).