Not sure how vague I am supposed to be to avoid spoilers, but here goes. If through the right dialogue choices you fight and kill Booal in the Festering Cove, the following conversation with the priest locks you into a dialogue you cannot escape. Clicking the dialogue choices just puts a tag of my steam username next to the answer chosen, instead of proceeding with the conversation. I had to Alt/f4 out of the game and reload to continue. I tried this again and the same bug occurred.