For a long time, my application was put on hold after all stages passed except security. Only until recently, I started to see some movement. Last month I received a request for re-medical as well as several ADRs. It wasn't just me but a lot of applicants got the same update from the London VO. I received my GCMS notes last week which seem to indicate my security is also completed.
This is a lot of positive movement after a year-long hiatus and this is why I'm not overly critical of IRCC right now. It's only been a couple of weeks since I submitted my documents, if my app gets stuck again for the next 6 months, I will hop on your boat to crucify IRCC and Mendicino lol.