I'm sorry for my bad english, but please could you explain better what happens and how to "solve" the problem? I can't understand what "before you put out any fires" means, but the whole post is somewhat "foggy" to me.I haven't tried any since 8.0, let alone 8.01, but it all depends on the behavior of the mission status box. If gets pushed off the top of the list of boxes (ie, so it moves down) shortly after disembarking, it will get killed after a timeout (box fade time, I guess), and when this happens, restore missions don't progress properly. Not only that, but just getting in and out of a vehicle (ship or srv) resets the mission state (but not the settlement).
So it's a combination of the mission box disappearing and disembarkation resetting the mission state.
If you notice the status box is missing before you put out any fires, you can take out the power regulator, board and disembark until the status box stays put, then power up the settlement. If you notice after putting out fires, you have to retrieve your PR, reset the settlement (super cruise trick), then return and start over.
Sorry again.