Keep an eye on mails sent to your old address too. Also, update your address on CIC website too.
Recently, one of my ex-building mate had similar experience. They moved to new address updated that with CIC, received few correspondence to new address. Shockingly, the CIC email their Oath invitations to old address and kept in the mail return box.
Since I know the family, I picked up those letter and informed them to collect it from me, lest they missed that opportunity.
Sadly, CIC is the most disorganized agency and evidently application processing was taking over 3 years till recently.
Sensing the change of political winds in the country, fearing many big heads would roll at CIC, things started moving faster.