On Feb 20th, the periodic-ci-openshift-release-master-nightly-4.19-e2e-metal-ipi-ovn-kube-apiserver-rollout job began experiencing an extremely predictable two blips of disruption to all apiserver reused connections, per apiserver rollout.

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.19-e2e-metal-ipi-ovn-kube-apiserver-rollout/1894151039204986880

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.19-e2e-metal-ipi-ovn-kube-apiserver-rollout/1893788388083896320

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.19-e2e-metal-ipi-ovn-kube-apiserver-rollout/1893425995889774592

Each shows the same disruption pattern in interval charts. Given the predictable two blips per rollout, this doesn't seem like it could possibly be environmental.

The problem does not appear in 4.18.