the most frequent variant of the dialogue bug: you meet Raphael, send him away, go out - and Gale asks why you agreed to work for Raphael
yeah, I got this one too in this exact play-through

And yes, there are many more dialogues out of place (chronologically).
During my first play-through, I went more or less standard way of completing the Act 3, so I didn't encounter many bugs or bugged dialogues.
This time just one not-very-standard move makes the game fall apart.
But with the duke this is not just dialogues mixing up. All the related quests are failed, with the respective logs in the journal.