This incident has been resolved.

Cloudflare has issued fix and service is recovering. See https://www.cloudflarestatus.com/incidents/zbzjv8sm3g94

The issue appears to be upstream of our service. Oncall engineering is continuing to monitor the service and is actively working with CloudFlare to correct this issue.

We are currently investigating connection failures, US East seems to be most effected although the issue may be present in other geographic regions.