I'm not sure if this is because of the beta patch, but I've only noticed this since then. I started having trouble placing stores in a settlement. Sometimes the option for a certain store will completely disappear from the workshop menu. I also have had problems assigning settlers to anything, stores in particular. I keep assigning them and they keep walking away, but sometimes a minute or so later it will say they are assigned. If I can get them assigned, at some settlements once they are working as a merchant, they will just say the generic settler phrases and won't sell. I don't have any settler related mods installed, just a settlement size mod (to let you build more).