[brooksgarrett]

Here is an AWS developer discussion that details their response:

https://forums.aws.amazon.com/message.jspa?messageID=851817#...

Quote for those without access: There is a known bug with Route 53 DNS servers in which we are not RFC compliant in how we handle a specific kind of invalid query. Namely, when Route 53 gets a query with an unknown EDNS version, Route 53 treats the query as a non-EDNS query instead of responding with BADVERS as ednscomp expects.

We expect to have this bug fixed within a year or two. The good news is that this bug is not impacting, so you'll be ok even if we're slow to fix this. The "dnsflagday" news means that servers that don't support EDNS will be treated as unavailable to resolvers. But Route 53 generally supports EDNS0, valid queries will continue to work regardless.

[rkagerer]

Curious, why does it take 1-2 years to fix such a bug?

[diroussel]

Because they chose to follow Postel’s Law, not the spec, and thus it is not a bug to them.

[sephoric]

DNS propagation time.