When fallback rules are not kicked-in, the cored return by ServeDNS is not the right one:
=> it should be the rcode returned by the following handler, not a combination of that rcode and the rcode returned by the Response.
Was discovered while trying to log the DNS messages and found that FALLBACK plugin had an influence on these logs although none of the rules of FALLBACK was hit.
When fallback rules are not kicked-in, the cored return by ServeDNS is not the right one: => it should be the rcode returned by the following handler, not a combination of that rcode and the rcode returned by the Response.
Was discovered while trying to log the DNS messages and found that FALLBACK plugin had an influence on these logs although none of the rules of FALLBACK was hit.