What I mean is an AI will look at the hall of mirrors effect and think "yes, that is the wall I was just looking at. no bug here" And the audio wouldn't be out of the ordinary because no sound plays when you clip through a wall.
https://i.imgur.com/lfI7zGE.jpg https://i.imgur.com/tgLNUuX.jpg
Come to the (un)official GameFAQs Touhou board. http://www.gamefaqs.com/boards/1110-