Hi,
Man, take it out from your mind a word called "revoke / cancel" please, don't just overthink and complicate things for yourself, there are thousands of people all around the world and for some reason their CoPR has been expired, there are 100's of reasons you might not able to fly before the expiry, God forbid you met with an accident, you can\t leave your work, someone is sick in your family etc... so just relax, as far as i know and even myself wrote to IRCC as i was in the same situation like yours, and i wrote to IRCC and below is their response.
"
Your application will not be closed or refused as a result of not being able to travel within the validity of these documents due to COVID-19 travel restrictions. If you are unable to travel before your documents expire, please contact our office using a
IRCC Web form within 90 days following expiry of your documents. "
So don't worry, things will be fine but keep it in mind that extension might take sometime...
Thanks.