Cloudflare One DNS issues with .internal zones

Resolved

This incident has been resolved.

Update

A fix has been implemented and we are monitoring the results.

Update

The issue has been identified and a fix is being implemented.

Investigating

We are investigating issues with Cloudflare One (Client and WAN) where DNS resolutions are failing for .internal zones when they are served by private DNS resolvers reachable via Cloudflare One only.