This is the process:
1. apply nncp process.
oc apply -f nncp.yaml

2. It fails
[ciuser@tigon28 ~]$ oc get nncp
NAME STATUS REASON
nfv-master-0 Degraded FailedToConfigure
nfv-master-1 Degraded FailedToConfigure
nfv-master-2 Degraded FailedToConfigure

3. I event have problems to execute oc commands, but this is solved after a few seconds
[ciuser@tigon28 ovs-dpdk-sriov]$ oc get nncp
Unable to connect to the server: dial tcp 192.168.51.2:6443: connect: no route to host
[ciuser@tigon28 ovs-dpdk-sriov]$ oc get nncp
Unable to connect to the server: dial tcp 192.168.51.2:6443: connect: no route to host

4. I delete nncp
[ciuser@tigon28 ~]$ oc delete nncp nfv-master-0
nodenetworkconfigurationpolicy.nmstate.io "nfv-master-0" deleted
[ciuser@tigon28 ~]$ oc delete nncp nfv-master-1
nodenetworkconfigurationpolicy.nmstate.io "nfv-master-1" deleted
[ciuser@tigon28 ~]$ oc delete nncp nfv-master-2
nodenetworkconfigurationpolicy.nmstate.io "nfv-master-2" deleted

5. I apply nncp again, same file
[ciuser@tigon28 ovs-dpdk-sriov]$ oc apply -f nncp.yaml
nodenetworkconfigurationpolicy.nmstate.io/nfv-master-0 created
nodenetworkconfigurationpolicy.nmstate.io/nfv-master-1 created
nodenetworkconfigurationpolicy.nmstate.io/nfv-master-2 created

6. Now it is ok
[ciuser@tigon28 ovs-dpdk-sriov]$ oc get nncp
NAME STATUS REASON
nfv-master-0 Available SuccessfullyConfigured
nfv-master-1 Available SuccessfullyConfigured
nfv-master-2 Available SuccessfullyConfigured

In the logs of oc nodes I can see:
Apr 05 12:19:12 nfv-master-0 kubenswrapper[2858]: E0405 12:19:12.279688 2858 kubelet_node_status.go:589] "Error updating node status, will retry" err="error getting node \"nfv-master-0\": Get \"https://api-int.nfv.openstack.lab:6443/api/v1/nodes/nfv-master-0?resourceVersion=0&timeout=10s\": net/http: request canceled (Client.Timeout exceeded while awaiting headers)"
Apr 05 12:19:22 nfv-master-0 kubenswrapper[2858]: E0405 12:19:22.280340 2858 kubelet_node_status.go:589] "Error updating node status, will retry" err="error getting node \"nfv-master-0\": Get \"https://api-int.nfv.openstack.lab:6443/api/v1/nodes/nfv-master-0?timeout=10s\": net/http: request canceled (Client.Timeout exceeded while awaiting headers)"
Apr 05 12:19:32 nfv-master-0 kubenswrapper[2858]: E0405 12:19:32.281222 2858 kubelet_node_status.go:589] "Error updating node status, will retry" err="error getting node \"nfv-master-0\": Get \"https://api-int.nfv.openstack.lab:6443/api/v1/nodes/nfv-master-0?timeout=10s\": net/http: request canceled (Client.Timeout exceeded while awaiting headers)"
Apr 05 12:19:36 nfv-master-0 kubenswrapper[2858]: E0405 12:19:36.975833 2858 kubelet_node_status.go:589] "Error updating node status, will retry" err="error getting node \"nfv-master-0\": Get \"https://api-int.nfv.openstack.lab:6443/api/v1/nodes/nfv-master-0?timeout=10s\": http2: client connection lost"