I ALSO HAVE SAME TIMELINE.Don't worry. Not sure how CIC works and what way of processing they choose.
My AOR is before you, Sept 13. I got pre arrival in March but no medical till now. MPNP applicant too.
So not sure who should be worrying more, you or me? LOL
FILE REC. 11 AUG
AOR 21SEP
PRE ARRIVAL 23 MAR
NO UPDATE AFTER THAT. NO MR YET.