I added my wife after getting COPR. Got married in November 2018, Informed CIC about marriage on December, Got request to submit my passport for COPR cancellation on Jan2019. CIC requested me to submit my wife's documents and medical on Feb2019. They gave one month time and I submitted the requested documents on 15 Feb 2019 except birth certificate. Again CIC requested for her Birth Certificate by 15 Mar 2019 and submitted on 15th March. Still waiting for update on my application. During this time my medical expired and status changed from Passed to You don't need medical exam. My guess is, after updating your application about your marriage, it's gonna take more than 6 months.