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I received the PR Confirmation Portal email this morning to which I responded in an hour. Hope for others who are waiting to get theirs soon.

In my response to IRCC email, I chose the option of creating the dependents accounts under my principal applicant's account. I just sent one email to IRCC, mentioning all applicants' details and specified the same my email id for all.
 
Does anybody's background stuck on
"Your application is in progress. We will send you a message when we start your background check"(Previously it was "We are processing ........") with AOR OCT 2020?
Details are in Signature.