Game crashes when trying to get an astronaut out of his command module

I cannot get my astronaut (Hassan) out of his command module. He seems to have disappeared and the command module indicate it is unassigned - although the Astronaut launch condition is still fulfilled and the rocket can be sent back to a new mission. The game will crashes if another astronaut is assigned to this command module or if it is deconstructed.

Savefile_cycle_1617_rocket_bugged

I'm not sure what lead to this situation : my astronaut is in this state in all of the auto-saves. However I loaded an older backup save from a time 20 cycle earlier when this rocket came back from space with his command module only. At the time, Hassan the astronaut was still there. I rebuilt the rocket without replacing the command module and without unassigning the astronaut inside. 

If I send the rocket back to space right away it will come back with the astronaut just fine. However, the command module suddenly becomes unassigned if there is an astronaut inside the command module when I save & reload the colony afterward.

This is the save file with the command module alone : Savefile_cycle_1598_Command_module_alone  Hassan the astronaut won't go back inside this command module :

This the save file with the rebuilt rocket and "unassigned" command module : Savefile_cycle_1599_Rocket_rebuilt_astronaut_vanished 

EDIT : I realized it is still possible in this older backup save to assign another astronaut to this rocket without crashing the game. So in the end. I'm just really confused as to how it got to a state, only a dozen cycle later, where the astronaut is completely stuck inside the command module and cause the game to crash when I try to get him out.

-_-"  

My best guest is that afterward, I sent the rocket with the "unassigned" command module to a new mission in space again and it came back really bugged. Its possible that only step 3 and 4 below are relevant. Unfortunately, I don't really have time to launch more rockets right now to verify this. But I hope this was helpful somehow !