The Treasure of the Midnight Isles Bugged?

I started this DLC in Act 3 of the campaign. I just finished the first 13 islands but I have no way to return to the normal campaign and also no way to progress the DLC (because I’m only in Act 3). At some point after entering the islands the exit of the outdoor area was replaced by a couple of fallen trees blocking it and the exit button is gone. At the same time, even after speaking to the shadow on the boat and everything I can’t continue navigating on the boat and no one on the boat or in the cave has any additional dialogue options that let me go back. Is this a bug or am I just missing something?

(Toybox mod’s go to global map at least got me out of this)