cluster operator console/authentication shows degraded for about 6 minutes after updating ingresscontroller LB scope

Description of problem:
The cluster operator console/authentication shows degraded for about 6 minutes after updating ingresscontroller LB scope

OpenShift release version:
4.10.0-0.nightly-2021-12-21-130047

Cluster Platform:
AWS

How reproducible:
100%

Steps to Reproduce (in detail):
1. launch a cluster on AWS
2. change the LB scope:
$ oc -n openshift-ingress-operator patch ingresscontrollers/default --type=merge --patch='{"spec":{"endpointPublishingStrategy":{"loadBalancer":{"scope":"Internal"}}}}'

3. Check the message from "oc get co/ingress" and follow the instructions and delete the LB service.
$ oc -n openshift-ingress delete svc/router-default
service "router-default" deleted

4. check the status of cluster operators
$ oc get co

Actual results:
During the process of LB re-provision and DNS records refresh, co/console and authentication shows degraded for about 6 minutes. see:

$ oc get co
NAME VERSION AVAILABLE PROGRESSING DEGRADED SINCE MESSAGE
authentication 4.10.0-0.nightly-2021-12-21-130047 False False True 5m20s OAuthServerRouteEndpointAccessibleControllerAvailable: Get "https://oauth-openshift.apps.hongli-a22.qe.devcluster.openshift.com/healthz": dial tcp: lookup oauth-openshift.apps.hongli-a22.qe.devcluster.openshift.com on 172.30.0.10:53: no such host (this is likely result of malfunctioning DNS server)
<--snip-->
console 4.10.0-0.nightly-2021-12-21-130047 False False False 5m24s RouteHealthAvailable: failed to GET route (https://console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com): Get "https://console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com": dial tcp: lookup console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com on 172.30.0.10:53: no such host

1. 1. 1. try more, after a while the authentication is avaible but console still shows degraded (6m6s)
         $ oc get co
         NAME VERSION AVAILABLE PROGRESSING DEGRADED SINCE MESSAGE
         authentication 4.10.0-0.nightly-2021-12-21-130047 True False False 37s
         <--snip-->
         console 4.10.0-0.nightly-2021-12-21-130047 False False False 6m6s RouteHealthAvailable: failed to GET route (https://console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com): Get "https://console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com": dial tcp: lookup console-openshift-console.apps.hongli-a22.qe.devcluster.openshift.com on 172.30.0.10:53: no such host

Expected results:
using nslookup to check the DNS record from outside cluster and find it can be refreshed within about 2 minutes, so co/console and authentication should not stay in Degraded status for such a long time.

Impact of the problem:
unfriendly user experience

Additional info:

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