auto-explore gives false "nothing more to explore"s
When using # to auto-explore, I received the message "there is nothing left to explore", despite there being unexplored spaces nearby. The only difference is that I had closed a door in the way.
I also see this happening if you attempt to move into a space you can't, such as down a well or declining to swap locations with a townsfolk, despite there clearly still being locations to explore.