Certificate associated with Cloudfront does not resolve to an IP

Hello,
I have created a subdomain certificate for one of my domains (e.g cdn.example.com) that are hosted through Route53 and then associated it with a Cloudfront distribution successfully. AWS Certificate manager shows my certificate as valid. However, if I check the cdn.example.com in any SSL validator it tells me "cdn.example.com doesn't resolve to any IP". I have a similar setup for many other domains and all certificates work fine.
Did anyone have any experience in something similar?
Thank you very much