Getting 522 from india, seems fine in US, no problems indicated on cloudwatch

We have some developers in India that have been working on our site hosted on AWS. Over the last several days they have been encountering 522 errors and saying it is slow. I don’t experience it here in the US, and cloud watch metrics don’t indicate any issues. This server isn’t used by the public so traffic is minimal. I’m at a loss as where the issue could be.