See: hazeron.com/wiki/index.php/Decay#Spacecraft_Decay
My best guess is that "Crew Mutiny" is the cause, assuming it is controlled by timestamp? Maybe "Crew Mutiny" should be disabled in Hazeron Starship, or at least redesigned to be more interesting for a singleplayer game.
You can try and check your mail for status reports from the ship, maybe they will tell you what happened with the self destructs.
My best guess is that "Crew Mutiny" is the cause, assuming it is controlled by timestamp? Maybe "Crew Mutiny" should be disabled in Hazeron Starship, or at least redesigned to be more interesting for a singleplayer game.
You can try and check your mail for status reports from the ship, maybe they will tell you what happened with the self destructs.