What came first: the CNAME or the A record?

This Cloudflare blog post explores a technical issue caused by a change to the 1.1.1.1 DNS resolver that inadvertently altered the order of CNAME records in DNS responses, leading to resolution failures for some clients. The post delves into the technical root cause, examines the source code of affected resolvers, and discusses the inherent ambiguities in the DNS RFCs regarding the order of records.