The PR was committed in load https://openshift-release.svc.ci.openshift.org/releasestream/4.3.0-0.nightly/release/4.3.0-0.nightly-2019-12-12-004325 30hours ago. But it reproduced with latest payload in 5 hours: https://search.svc.ci.openshift.org/?search=Cluster+operator+kube-apiserver+Progressing+is+True.*nodes+are+at+revision&maxAge=6h&context=15&type=all Verification failed.
Didn't see many of "key failed with : clusteroperator/kube-apiserver is not Available" in https://search.svc.ci.openshift.org/?search=clusteroperator%2Fkube-apiserver+is+not+Available&maxAge=336h&context=2&type=all. It reported twice at most shown as: https://storage.googleapis.com/origin-ci-test/logs/periodic-ci-openshift-knative-eventing-release-v0.6.0-e2e-aws/178/build-log.txt. Verification pass.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:0062