Thats exactly my question too, we received our AOR for PR application on June 11 2017. Application proceeded normally, we had a baby after that, I informed CIC about that and were asked on Sept 6 to get baby's medical done. We completed and submitted that around 15 Sept. Since then I see the we have passed the medical exam under the application status, it says that the additional documents I provided are being reviewed, no interview or biometrics needed and background check is not applicable.
I was wondering if the 6 months processing time window would be reset and would start from Sept or what kind of delay should we expect.