We changed address to Canada when we came. We had to apply for visitor visa extension in June and got approved in December 2020, and also I made a call to IRCC and confirmed current address the day before the COPR. I'm not sure which factor matters.That's weird, for my in-laws they received a PPR email and was told to email MANILIMMIGRATION@international.gc.ca if they reside in Canada which we already did.
ECAS is already DM for them.
Anyway, I guess you need to follow the instructions in the letter and send email and let them know the current address. Good luck!