N400 Interview cancelled

[salmanshahi]

Hi me and my wife submitted online application for N400 in march 2021, next day received confirmation receipt and biometric reuse, my wife status got changed to interview scheduled on 12th Aug 2021 while no change in my status, on 31st Aug her status changed to interview descheduled/cancelled , i called the USCIC and inquired about it and they said its due to unforeseen reason and will be rescheduled again but didn't commented when i asked, i also inquired my case as me and my wife submitted the application same day, the officer said your case was forwarded to MN office to schedule interview on 12th Aug which is same day my wife got status change for Scheduled for interview, anyone experiences the same issue and how much time it takes to get the interview scheduled once background clearance is done