I have a similar timeline: AOR June 28, 2019, FSW-O. As of September 5th my case (per GCMS notes) was: Medical: Passed; Criminality: Passed; Eligibility: Met; Security: Not Started.
I have looked for a lot of information on how long the Security takes once initiated. I didn't find much, but I did find another CanadaVisa thread by
@legalfalcon that suggested the average timeline for Security for a economic class candidate could range between 1-3 months. There was a lot of other useful information in his post as well--give it a read, as it might give you some answers:
https://www.canadavisa.com/canada-i...-a-background-check-in-depth-analysis.500146/.
Long story long: It sounds like you could still get PR within the 9-weeks if your Security only takes a month or so.... but, it sounds like it could also take longer... only time will tell! Here's hoping your wait is short and you receive some good news soon