SERVFAIL with Blackberry subdomains aren’t resolvable using Cloudflare DNS. It returns SERVFAIL.

Cloudflare DNS
Screenshot 2020-05-02 at 00.15.51

Another domain that refers to this domain as CNAME,

Hi, I’ve added a workaround that should resolve shortly. There’s an issue with the intermediate name in the resolution process that forms a referral loop.

Goodnight. I am testing it from Buenos Aires - Argentina and I confirm that the domains in question are already being well resolved.