Since installing the beta I've had problems with my settlers wandering outside of their settlements, between settlements, and even attacking me outside of settlements (without provocation). Also, the minutement repeatable "Settlement in need of help" quest giving settler wanders between settlements (quest given in Tenpines, turn in is at Abernathy Farm).

I like the mechanic where I can see what a settler is assigned to, but the unassigned settlers are wandering the map and getting into trouble. Assigning them to something only works if I can track them down and if there's something for them to even do.