Multiple Cluster Operators are degraded with failed to call webhook error in RHOCP4

Issue

The RHOCP cluster is down as multiple critical Cluster Operators (CO) such as authentication,etcd,kube-apiserver, kube-controller-manager, kube-scheduler, machine-config are degraded with the below error.

$ oc get co
<..>
etcd                                       4.12.9    True        False         True       660d    GuardControllerDegraded: Unable to apply pod etcd-guard-example.com changes: Internal error occurred: failed calling webhook "example-service.test.svc": failed to call webhook: Post "https:/example-service.test.svc:19090/mutate?timeout=10s": service "example-service" not found

kube-apiserver                             4.12.9    True        False         True       660d    GuardControllerDegraded: Unable to apply pod kube-apiserver-guard-example.com changes: Internal error occurred: failed calling webhook "example-service.test.svc": failed to call webhook: Post "https://example-service.test.svc:19090/mutate?timeout=10s": service "example-service" not found
<..>