It’s not surprising they called all three people. It’s there first passport . I’ve had seven passports issued over the course of life , born here . Who ever has signed my documents from my first passport @ 14 to recently have always been called
No-one I know whom has a Canadian passport has ever reported any of their contacts being called, including people who got their Citizenship recently (last Summer). I think I even saw a few posts here claiming the same! But will try and remember to post back here with my personal experiences.