Sounds like an old bug reintroduced it happened to my Tav once before around patch 5, I was able to force onwards by hitting either escape key or spacebar whichever key you have set to skip dialogues to move forward.
It feels like something about it just does not finish properly but I also only had it happen once as in not being able to reproduce this hangup, game started from an older patch or was it a fresh new game started after patch 7?
