Build a summoning bell and ring it when you want to barter.
This can be hit and miss so you really need to experiment here with different locations.Ģ. Move the shops closer to the settlement workshop. Reassigning the the shops seems to be a temporary fix but the bug always comes back, at least for me.ġ. This is more likely to happen in the larger settlements but from what I've seen while researching this issue, it can happen in smaller settlements as well. The further away they are, the more likely the bug is to trigger. The problem seems to occur when your shops are far away from the settlement workshop. As a matter of fact, I've experienced this bug myself so I'll tell you what seems to work for me. This is an old issue that has never been properly addressed by Bethesda since the game's release.