Speculation, grapevine, rumour, whatever you choose to call it, but Mississauga has been one of the biggest offices for problematic applications (as well as the total number of applications), hence the closer scrutiny. It is frustrating when you know that everything is right in the application, but that's the nature of the beast. I am aware of people in nearby areas in GTA whose travel history and residence in Canada matched mine closely, but they breezed through in 8 months from application to passport (circa 2018/2019) while I'm still waiting, over 3 years later. Yes, Covid has been a factor but.....