I have tried this too without sucess. The way I did this was the following
I fast travelled to the nearest safehouse which was Stenhaga Farm in my case. When I arrived I exited the game by going to Main Menu and then i chosed Continue to get back into the game.
After that I followed your steps, I ran all the way back to Salthamn and I did not even look at the houses and just ran right into the bunker, I picked up the map and the document with the list of names. Once i had those I ran out of the bunker and went into Göstas home and took the audio messege from Anita, after I had that I went to Anita’s house and picked up the map.
Once I had done this, nothing happend. Below is everything I have tried to progress.
I have started off with the bunker, i take two clues in there (clue 4 and 5 from left to right). After that I have gone to all the houses in two different orders since the list and the text is different. So the order I have tried and what i’ve found in each house is this.
1 - Forellbacken 3 - There i find clue 1 which is a audio recoring in the answering machine.
2 - Olle Fiskares väg 3 - There i find clue 3 which is the evacuation map.
3 - Måsgatan 1 - There I find clue 2 which is a scribbled letter.
4 - Vintergatan 8 - I have spent hours looking through this house, garage, lawn, shed and I have found no clue there what so ever.
The other order I have visited the houses has been by following the text and not the list, which is the following.
1 - Forellbacken 3
2 - Måsgatan 1
3 - Vintergatan 8
4 - Olle Fiskares väg 3
And I found same clues in each house regardless, same as nothing in Vintergatan 8. I even gone through the houses around the 8 on Vintergatan on the map to make sure i was in the right house without sucess.
I have tried to go to the main menu and continue multiplie times (4-5 times so far now) and try these in different orders. I have started off with taking all the clues in the houses apart from Vintergatan 8 which has no clue and then entering the shelter and take the two clues there without turning the power on first.
Second way i tried is to do exacty the same as above but turning the power on first and then take the clues and there is no difference.
I have collected 5 clues apart from clue 6. I have also tried starting off in the shelter with the power on and taken the clues there and then the houses, same as the power off first > clues > houses.
EDIT: I found a fix that worked for me. The only way that i got past this was to join a multiplayer session where someone else had not done that step i were stuck on. As soon we got to Salthamn I did the following. I ran into the bunker first, killed everything > RESTORED THE POWER > Then picked up both clues > ran out of the bunker and went to Forellbacken 3 to pick up the audio message > Then went to Olle Fiskares väg 3 to pick up the map > Mission updated.