Note, that changes to DNS records are affected by the previous record’s time to live (TTL) values: https://en.wikipedia.org/wiki/Time_to_live#DNS_records
This might explain why the SSL certificate wouldn’t update previously but did for me just now (meaning, the out of date record finally expired).
After a few failures, our system will stop trying to issue a certificate until the button is clicked (or you contact us here in the community forum for assistance).
Thanks so much! You’re a hero!