Here is what happened to me.
Moved 12/11, Orig ID 1/21. Filed AR11-12/20. Appt cancelled and file sent to Fairfax DO. Fairfax schedules for 2/10. Cannot go due to Snowmagaddon.
Walked in on 2/17. Interview passed, residency came into question. Issued N-652, decision cannot be made.
Mar 1, sent a request to prove 3 mo. residency. Resp on Mar 12 with settlement copies.
Made a few trips with InfoPass, on 3rd trip in mid april was told that it was approved, but not in the queue for oath.
Finally got the oath notice in 3rd week of May.
Hindsight - Should have contacted USCIS that 3 mos. are not over and reschedule the date (again no guarantees).
Cheers!