After node reboot some pods on the rebooted node fail to start:
oc describe po -n openshift-kube-controller-manager kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com
...
Events:                                                                                                                                                                                                                         Type     Reason                  Age   From          Message                                                                                                                                                                  ----     ------                  ----  ----          -------                                                                                                                                                                  Warning  ErrorAddingLogicalPort  41m   controlplane  deleteLogicalPort failed for pod openshift-kube-controller-manager_kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com: cannot delete GR SNAT for
pod openshift-kube-controller-manager/kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com: failed to delete SNAT rule for pod on gateway router GR_master-1.kni-qe-31.lab.eng.rdu2.redhat.com: error in t
ransact with ops [{Op:delete Table:NAT Row:map[] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {49c251e2-d559-49b1-ad66-56e2f95f3c4e}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:delete Table:NAT Row:map[] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {ad95fc45-9360-4203-8ec5-95d79367dca1}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:delete Table:NAT Row:map[] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {61cd5b51-4b35-4808-bb8b-fda76212340b}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:delete Table:NAT Row:map[] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {7053c099-d7e1-4f55-955d-6cb36f82091e}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:mutate Table:Logical_Router Row:map[] Rows:[] Columns:[] Mutations:[{Column:nat Mutator:delete Value:{GoSet:[{GoUUID:49c251e2-d559-49b1-ad66-56e2f95f3c4e} {GoUUID:ad95fc45-9360-4203-8ec5-95d79367dca1} {GoUUID:61cd5b51-4b35-4808-bb8b-fda76212340b} {GoUUID:7053c099-d7e1-4f55-955d-6cb36f82091e}]}}] Timeout:<nil> Where:[where column _uuid == {bb579280-ea53-4d11-8c4f-d9fc6702314b}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:}] results [{Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {C
ount:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:0 Error:referential i
ntegrity violation Details:cannot delete NAT row ad95fc45-9360-4203-8ec5-95d79367dca1 because of 1 remaining reference(s) UUID:{GoUUID:} Rows:[]}] and errors []: referential integrity violation: cannot delete NAT row ad95fc45-9360-4203-8ec5-95d79367dca1 because of 1 remaining reference(s)

   Warning  FailedCreatePodSandBox  38m   kubelet       Failed to create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com_openshift-kube-controller-manager_cbc6c67a-3b3a-4441-ae7c-f433a9b56895_0(f580c2844bd2bc42ce314871f38ca69bc642b80714b2c10bc0d212cfed75bf02): error adding pod openshift-kube-controller-manager_kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com to CNI network "multus-cni-network": plugin type="multus" name="multus-cni-network" failed (add): [openshift-kube-controller-manager/kube-controller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com/cbc6c67a-3b3a-4441-ae7c-f433a9b56895:ovn-kubernetes]: error adding container to network "ovn-kubernetes": CNI request failed with status 400: '[openshift-kube-controller-manager/kube-con
troller-manager-guard-master-1.kni-qe-31.lab.eng.rdu2.redhat.com f580c2844bd2bc42ce314871f38ca69bc642b80714b2c10bc0d212cfed75bf02] [openshift-kube-controller-manager/kube-controller-manager-guard-master-1.kni-qe-31.lab.eng
.rdu2.redhat.com f580c2844bd2bc42ce314871f38ca69bc642b80714b2c10bc0d212cfed75bf02] failed to get pod annotation: timed out waiting for annotations: context deadline exceeded                                                 '

4.12.0-rc.0 (updated from 4.12.0-ec.5)

so far just 1st attempt to perform update

1. Cordon and drain the node
2. Reboot the node
3. Check pods scheduled on the rebooted nodes after nodes is back online

Some pods fail to start on rebooted node

All pods started on rebooted node

Baremetal dualstack cluster with schedulable masters and 2 workers(in another network) deployed with on premise Assisted Installer