ec2.us-east-1.amazonaws.com endpoint resolving to private IP address

While troubleshooting an issue our developers noticed that in one of our subnets ec2.us-east-1.amazonaws.com is resolving to private IP addresses in our subnet instead of the normal public IP addresses. Strangely enough it appears that it is only happening for the ec2.us-east-1.amazonaws.com endpoint. The s3.us-east-1.amazonaws.com resolves correctly as does the ec2.us-east-2.amazonaws.com endpoint.

Is there anything we can do on our end to resolve this other than tearing down this subnet and recreating a new one?