Basically today I passed the interview without any problem and IO told me my case is recommended for approval. However, my online status changed to "Post Decision Activity" and shows "Your case is under review with a supervisor". Is this normal? I'm a little worried and I can't think of anything may raise concerns but why my case needs a supervisor to review it? Especially I knew some other guys have been offered to wait for their oath letter on site today. But my IO sent me back to wait for the oath letter. Please share your precious experience brothers and sisters!