After an upgrade a random VM will lose it's networking.  Meaning that from within the guestOS the DHCP IP Address does not populate.  
This issue has been seen between upgrades to various versions of OCP including but not limited to:
4.19.9 -> 4.19.10
4.19.11 -> 4.19.12 

4.19

1.
2.
3.

The virt-controller on the node fails to get service to 'kubevirt-ipam-controller-webhook-service'
~~~
  "component": "virt-controller",
  "kind": "",
  "level": "error",
  "msg": "failed to sync dynamic pod labels during sync: Internal error occurred: failed calling webhook \"ipam-claims.k8s.cni.cncf.io\": failed to call webhook: Post \"https://kubevirt-ipam-controller-webhook-service.openshift-cnv.svc:443/mutate-v1-pod?timeout=10s\": no endpoints available for service \"kubevirt-ipam-controller-webhook-service\"",
  "name": "virt-launcher-win2k22-orange-butterfly-14-89v22",
  "namespace": "default",
  "pos": "vmi.go:390",
  "timestamp": "2025-09-25T15:27:24.858167Z",
  "uid": "fa4ad577-3487-4df1-9b9a-e76087b34c6b"
~~~

During an upgrade the VMs not to lose the network connectivity or IP Address 

This has happened to the last 3 upgrades that at least 1 VM will be affected.