Console operator or Authentication operator degraded: server misbehaving

Issue

• Console operator degraded with message:

  message: 'RouteHealthDegraded: failed to GET route (https://console-openshift-console.apps.example.com/health): Get "https://console-openshift-console.apps.example.com/health": dial tcp: lookup console-openshift-console.apps.example.com on 10.0.0.1:53: server misbehaving'
  

• Authentication operator degraded.

  message: 'OAuthRouteCheckEndpointAccessibleControllerDegraded: Get "https://oauth-openshift.apps.example.com/healthz": dial tcp: lookup oauth-openshift.apps.example.com on 10.0.0.1:53: server misbehaving'
  

• There are several DNS forwarding rules in dns operator.
• Checking the dns operator, there are unknown forward rules.
• Why the dns operator contain forward rules for internal OpenShift components?