Every time I enter the dojo, the destination changes. Sometimes it's hidden inside the wall.
https://imgur.com/s0Dhdox.jpg
https://imgur.com/0ZWKC74.jpg
https://imgur.com/1OGAjhe.jpg
https://imgur.com/oJWhD8x.jpg
postscript
This bug occurs when entering the dojo after a mission.
It can also spawn in rooms under construction.
https://i.imgur.com/0QgbLJy.jpg