OVN-kube timeout after reboot on OSP 16.2

Issue

When upgrading Openshift on Openstack 16.2, Openshift virtual machine reboot. After those reboot, OVN-kube on Openshift master node can't established connection with other OVN-kube peers.

<DATE>      1 ovnkube.go:133] error when trying to initialize libovsdb SB client: unable to connect to any endpoints: failed to connect to ssl:10.31.0.x:9642: endpoint is not leader. failed to connect to ssl:10.31.0.y:9642: failed to open connection: dial tcp 10.31.0.y:9642: i/o timeout. failed to connect to ssl:10.31.0.z:9642: failed to open connection: dial tcp 10.31.0.z:9642: i/o timeout