Exploration Tour won't complete?

So, there is an achievement for the game called Exploration Tour where you have to visit every location on the map in one mission. And it's been stuck at 93% for months now.

Two games in a row I have physically avoided doing anything but exploring every POI on Mammon's and Stillwater respectively.

Both the name of the POI popped up for both Mammon's and Stillwater. I made sure to explicitly run through every compound when I tried on Stillwater as well, yet it hasn't completed the achievement.

Am I doing something wrong? Do I have to do it with the bounty token? The only thing that could be a factor the bounty carriers left before I get to the last POI. Does that invalidate the progress?