As a Yui owner, I can help with that maybe.
I entered a room, spotted the right orb, then waited for 30 secs.
It never changed from that one orb, then I hit it and it worked.
Maybe it goes clockwise, but stops going clockwise when the orbs actually get in view?
I think its on a per room basis? I tested it once awhile back and I remember that after 10 seconds the orb in the next room will change.