ETCD restore process OVN network pods hang in the Terminating status

Issue

Reference the OpenShift ETCD restore document, the step 14-d.Delete all ovnkube-node pods, then all OVN pods hang in the Terminating status

$ oc get pods -n openshift-ovn-kubernetes -o name | grep ovnkube-node | while read p ; do oc delete $p -n openshift-ovn-kubernetes ; done

$ oc get po -n openshift-ovn-kubernetes
NAME                   READY   STATUS        RESTARTS   AGE
ovnkube-master-67b77   6/6     Running       40         189d
ovnkube-node-6sq8r     5/5     Terminating   29         189d
ovnkube-node-7sf4k     5/5     Terminating   24         189d
......