This issue has been resolved.

We are continuing to monitor for any further issues.

Google is reporting that all 502 errors should be resolved. We are monitoring the situation for now.

Google is reporting issues globally with their load balancers. The impact appears intermittent at the time and you may be seeing 502 or bad gateway errors.

Google Cloud is reporting issues with their load balancers, as reported on their status page. We will update when we know more

https://status.cloud.google.com/incident/cloud-networking/18012

We’re noticing issues with some GCP based nodes in GCP us-east-1. The issue seems to be limited to GCP servers at this time. We are looking into it.