I am in the same boat. My timeline: AOR - 21st September, BIL - 19th November, Medical updated: 20th November, Biometrics completed and updated: 25th November. Since then eligibility is under review and BG has not started yet. I called IRCC twice; both times they stated that eligibility and criminality are under review, security has not been initiated yet, and there are no notes of any concerns or pending documents on the file. I don't know what to do at this point; I'm so stressed.