@pemyrie exactly, received by mail (the permit only) as usual.
We Didn't received any approval letter though (either by mail or online).
The old ones expired in Nov 26th 2019, We applied for the new one in Nov 16th 2019.
I've noticed a ghost update on the BOWP applications (online) around Feb 10th 2020, but nothing had changed (Calling IRCC late in late February, they said it had been approved in Feb 9th 2020).
The online application still don't show any change, either approved or anything else, it's exactly like it always was.
The permit we received by mail show expiration date as Feb 9th 2021 (1 year).