Our citizenship tests were marked as completed on July 12th, but received an email yesterday asking us (me and my wife) with "INVITATION TO AN IN-PERSON INTERVIEW WITH A CITIZENSHIP OFFICIAL AND VERIFICATION OF IDENTITY/DOCUMENTS" at Kitchener office on August 1st. The interview invitation letter mentioned "On the day of this event, you will be interviewed by a citizenship officer or agent to verify your identity
and the documents you provided at the time you applied for citizenship."
Not sure the reason for this interview as I don't think everyone is getting them. AFAIK, there should be nothing special with our case as our profile is pretty straight forward (moved in work permit, switched to PR and applying for citizenship now and only traveled to India and USA couple of times).
Let me know if anyone else in this group called for such an interview or attended one, otherwise will update this group once my interview is complete.