AWS Route 53 experiencing occasional DNS resolution errors

Confirmed as a DDOS (now resolved). https://www.theregister.co.uk/2019/10/22/aws_dns_ddos/

I am seeing this affect s3 content, most likely because the domain is not resolving correctly.

And, as usual, the actual service has a green checkmark even though the top of the page acknowledges problems.

I am having an issue submitting a Coursera assignment because of this