I don't think there's any reason to panic. I mean you're officially a PR once you land, right? If there are errors on your landing record it might be a hassle to correct, but that'll get sorted out sooner or later. If you urgently need to PR card to get out of the country, there are ways around that, too..
ECAS has been proven to be very unreliable to get current status. I landed on Jun 13 and there has been no update to reflect my landing. My status never changed to "Complete" as it stays in "Decision Made" :