CNAME flattening isn't working

Welcome to the Cloudflare Community. :logodrop:

Did you try clicking that :point_up_2: link?

Which name did you configure at Buzzsprout. While their guide indicates that you can use your apex name with a DNS host that has CNAME flattening (or equivalent), it did not indicate that you can use both the root and a specific hostname.

You may want to delete your apex CNAME and replace it with a :orange: proxied AAAA record of 100:: (a special IPv6 address in the discard prefix). You can then use a redirect rule to send visitors to the www name just like in the first example here.