Do you have to have the AAAA record for a custom domain to work?
I have the same question. My Service Provider did not suport ipv6 at the moment. Is this a problem?
I don’t have a definitive answer, but I can tell you that I configured a custom domain earlier this evening. All that was required was a TXT record, and an A record. Within about 15mins of making the change, it had propagated and was working perfectly.