Yeah I'll call them. This link https://www.canada.ca/en/immigration-refugees-citizenship/corporate/publications-manuals/operational-bulletins-manuals/bulletins-2012/423-expired-may-24-2012.html says the process of medical extension applies to cases where a final decision of an officer is pending only due to the expiration of a medical certificate. Assuming this is still the case I take back my last explanation. It says this Operational Bulletin has expired though.You may check this by calling them next week or so, and ask what is the expiration date of your medical.