Have collected all clues and all pieces of armor in the first two rivers, however when I return to Vagn, nothing happens, no cutscene with access to the new river; only the same options, Raiding (existing rivers), Customize and Show Wares. Only remaining quest shows to "return the clues to Vagn at the settlement." But nothing happens when I return. Not sure if it's related, but often when I return from a raid, Vagn doesn't even have the option to speak and the Quest Log is empty; I have to reload the latest quicksave for there to be any options. Playing on PS4.