I tried to find an answer, I tried to tweak options, like the ones for auto-assign settlers. But seems that everytime that I run a city plan refresh, a supply route of a semi-random settlement, breaks. First was Sanctuary > Tenpines Bluff. After like 3 times seems that stop breaking. I even restarted Sanctuary since it was refusing to level. Same as Tenpines. Then Covenant > Teffington. Fixes after a couple of times. Vault 88 > Murkwater and Croup Manor > Kingsport Lighthouse lost it once. But the one that is getting on my nerves is Egret Tours Marina > Hangman's Alley. I lost the count of how many times I reset it, tried with a different settler, and even moved the original Provisioner to become a settler of Mechanist Lair. They all end up getting assigned to a different job that is usually the shop at the pier (armor, I think), and sharing the same space with other settler. I set a route from Hangman to Egret to see if that would fix, and just now I lost no only this supply route, but also the Hangman > Oberland. It's like a settlement get all jobs reseted. I had no issues back then, when I just had SS and IR, cause RotH didn't existed. Also there is no other mod that would affect settlers or settlements behavior, except Better Settlers. Just some that add new objects.