If that were the reason I wouldn't expect this update: 6:36 AM PDT [RESOLVED] Between 4:31 AM and 6:10 AM PDT, we experienced errors resolving the DNS hostname

If that were the reason I wouldn't expect this update: 6:36 AM PDT [RESOLVED] Between 4:31 AM and 6:10 AM PDT, we experienced errors resolving the DNS hostnames used to access some AWS services in the US-EAST-1 Region. During the issue, customers may have experienced failures indicating "hostname unknown" or "unknown host exception" when attempting to resolve the hostnames for AWS services and EC2 instances. This issue has been resolved and the service is operating normally.