As titled
What are the chances that boarder agent would stop and revoke PR?
Also, changed nationality and PR card nationality is different from the current passport, lawyer suggested that it does not matter and no need to inform IRCC. Is that true?
You cannot be refused
entry into Canada, even if you do not hold a valid PR card. You would need the card to return to Canada by a commercial carrier, though.
Having said that, if the CBSA officer sees, or otherwise determines, that you have NOT met the Residency Obligation to maintain PR
status, he/she/they could issue a report that could lead to your status being revoked, but you would still be allowed to enter, pending a hearing.
Not sure about your second question.