16-18 months is a lot!!! It used to be 12-14 months . I don't think I can keep my sanity for that long. Oct 2023 AOR by the way, I see people from April 2023 still stuck in SS.Just adding my timeline:
Applied Nov29 2023, AOR DEC14 2023. Still waiting on SS. Last update I saw from a person said their SS was completed 18 months after their AOR.
I also monitor the "GCMS Security Screening" thread in the express entry group just to get an idea of progress (they have more people there sharing timelines), looks like they are also on average 16 - 18 months after AOR for security to complete.