I'm running through Nightmare Act 1 and have Shen from completing the game on Normal. I got the conversation with him about Wortham but before actually going there, I decided to knock off for the night. The option to talk to him about Wortham is now missing. In addition, in talking to him today, other conversation options that were previously there aren't anymore. Not sure if this is intended or if anyone else is having this issue or I'm just a bonehead and missing something obvious.