apply nmstate nncp to disable ipv6 on primary interface, got err: failed runnig probe 'dns' with after network reconfiguration

OCP: 4.13.0-0.nightly-2023-04-13-171034
knmstate operator: kubernetes-nmstate-operator.4.13.0-202304051915

not always, above 50%

1. install knmstate operator, create nmstate cr
% oc get pod -owide
NAME                                    READY   STATUS    RESTARTS   AGE     IP             NODE             NOMINATED NODE   READINESS GATES
nmstate-cert-manager-74b946dd5c-smqb2   1/1     Running   0          3h32m   10.129.0.192   ip-10-0-72-244   <none>           <none>
nmstate-handler-k5kp6                   1/1     Running   0          3h32m   10.0.62.221    ip-10-0-62-221   <none>           <none>
nmstate-handler-n57mf                   1/1     Running   0          3h32m   10.0.72.244    ip-10-0-72-244   <none>           <none>
nmstate-handler-tncl7                   1/1     Running   0          3h32m   10.0.59.96     ip-10-0-59-96    <none>           <none>
nmstate-operator-6fdc8cc7-tzdcg         1/1     Running   0          7h54m   10.130.0.72    ip-10-0-59-96    <none>           <none>
nmstate-webhook-6498d8fbfd-4sgvg        1/1     Running   0          3h32m   10.128.0.116   ip-10-0-62-221   <none>           <none>


2. apply below nncp, disable ipv6 on ens5
---
apiVersion: nmstate.io/v1
kind: NodeNetworkConfigurationPolicy
metadata:
  name: disable-v6
spec:
  nodeSelector:
    kubernetes.io/hostname: ip-10-0-62-221
  desiredState:
    interfaces:
    - name: ens5
      description: disable ipv6
      type: ethernet
      state: up
      ipv6:
        enabled: false
% oc apply -f disablev6.yaml 
nodenetworkconfigurationpolicy.nmstate.io/disable-v6 created


3. check status of nncp and nnce

nncp failed to configure:
% oc get nncp
NAME         STATUS     REASON
disable-v6   Degraded   FailedToConfigure
% oc get nnce            
NAME                        STATUS    REASON
ip-10-0-62-221.disable-v6   Failing   FailedToConfigure

nncp apply successful, ipv6 is disabled