Hi Guys,
I also did a landing on March 1. I got a photo re submission request on 15th March and resubmitted my photo around 21st March. No update since then. I went to US after landing and came back using my COPR. It was very comfortable experience, did not face any issue and anyone can enter Canada via land border (From US) using the COPR. Only time you need your PR card is while travelling via a flight/train/bus. Your COPR is sufficient proof of you being a PR holder and Canada needs nothing more to check to let you in. PR card is only required for flight guys and is not at all required for Canada immigration.
I sometimes get very worried for PR Card but it has absolutely no standing on our PR status. It is only required for travelling purposes.