The conversation with Sazza and the Goblin Guard is struggling to initiate. The goblin guard does not acknowledge that Sazza is there yet, Tav's conversation without Sazza plays out, and then Sazza tries to help the player get past.

This has resulted in combat starting and then Sazza intervening:
My party locked in combat as Sazza finally starts talking to the guard.

Tav gets to join the conversation again.

Combat Canceled, xD

It repeatedly plays out like this, I haven't been able to play out this sequence like it was in Patch 3. At least, Sazza cancels combat each time.