The internal FQDN not change when the VM name is not the same as hostname ? for example I have a vm name fedora-harlequin-gull-40 but the hostname is myvmi with subdomain headless . I can access the vm using headless service with myvmi.headless..... which is difference on the one showing in the console.

CNV 4.18.3 , OCP 4.18.18

1. Create a VM 
2. Change the VM hostname
3. Modify VM kind add hostname and subdomain to make headless service work.
4. Check the Console UI of the VM and look at the `internal FQDN` it will be <VM_NAME>.headless..... 
5. try access <VM_NAME>.headless.... -> inaccessible
6. try access <VM_HOSTNAME>.headless.... -> accessible

The internal FQDN shown in the VM console cannot accessible

the internal FQDN should work or change following the hostname of the VM not the VM name

apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  annotations:
    kubemacpool.io/transaction-timestamp: '2025-07-31T04:42:46.951761204Z'
    kubevirt.io/latest-observed-api-version: v1
    kubevirt.io/storage-observed-api-version: v1
    vm.kubevirt.io/validations: |
      [
        {
          "name": "minimal-required-memory",
          "path": "jsonpath::.spec.domain.memory.guest",
          "rule": "integer",
          "message": "This VM requires more memory.",
          "min": 2147483648
        }
      ]
  resourceVersion: '8306434'
  name: fedora-harlequin-gull-40
  uid: 02f851fd-28c9-435f-85a5-0db99a3c9d54
  creationTimestamp: '2025-07-30T15:09:24Z'
  generation: 10
  managedFields:
    - apiVersion: kubevirt.io/v1
      fieldsType: FieldsV1
      fieldsV1:
        'f:metadata':
          'f:annotations':
            'f:kubevirt.io/latest-observed-api-version': {}
            'f:kubevirt.io/storage-observed-api-version': {}
          'f:finalizers':
            .: {}
            'v:"kubevirt.io/virtualMachineControllerFinalize"': {}
      manager: virt-controller
      operation: Update
      time: '2025-07-30T15:09:24Z'
    - apiVersion: kubevirt.io/v1
      fieldsType: FieldsV1
      fieldsV1:
        'f:spec':
          'f:template':
            'f:spec':
              'f:subdomain': {}
      manager: kubectl-patch
      operation: Update
      time: '2025-07-31T04:06:24Z'
    - apiVersion: kubevirt.io/v1
      fieldsType: FieldsV1
      fieldsV1:
        'f:metadata':
          'f:annotations':
            .: {}
            'f:vm.kubevirt.io/validations': {}
          'f:labels':
            .: {}
            'f:app': {}
            'f:kubevirt.io/dynamic-credentials-support': {}
            'f:vm.kubevirt.io/template': {}
            'f:vm.kubevirt.io/template.namespace': {}
            'f:vm.kubevirt.io/template.revision': {}
            'f:vm.kubevirt.io/template.version': {}
        'f:spec':
          .: {}
          'f:dataVolumeTemplates': {}
          'f:runStrategy': {}
          'f:template':
            .: {}
            'f:metadata':
              .: {}
              'f:annotations':
                .: {}
                'f:vm.kubevirt.io/flavor': {}
                'f:vm.kubevirt.io/os': {}
                'f:vm.kubevirt.io/workload': {}
              'f:labels':
                .: {}
                'f:kubevirt.io/domain': {}
                'f:kubevirt.io/size': {}
                'f:network.kubevirt.io/headlessService': {}
            'f:spec':
              .: {}
              'f:architecture': {}
              'f:domain':
                .: {}
                'f:cpu':
                  .: {}
                  'f:cores': {}
                  'f:sockets': {}
                  'f:threads': {}
                'f:devices':
                  .: {}
                  'f:disks': {}
                  'f:interfaces': {}
                  'f:logSerialConsole': {}
                  'f:rng': {}
                'f:features':
                  .: {}
                  'f:smm':
                    .: {}
                    'f:enabled': {}
                'f:firmware':
                  .: {}
                  'f:bootloader':
                    .: {}
                    'f:efi': {}
                'f:memory':
                  .: {}
                  'f:guest': {}
              'f:hostname': {}
              'f:networks': {}
              'f:terminationGracePeriodSeconds': {}
              'f:volumes': {}
      manager: Mozilla
      operation: Update
      time: '2025-07-31T04:42:46Z'
    - apiVersion: kubevirt.io/v1
      fieldsType: FieldsV1
      fieldsV1:
        'f:status':
          'f:printableStatus': {}
          'f:runStrategy': {}
          'f:conditions': {}
          .: {}
          'f:ready': {}
          'f:volumeSnapshotStatuses': {}
          'f:observedGeneration': {}
          'f:created': {}
          'f:desiredGeneration': {}
      manager: virt-controller
      operation: Update
      subresource: status
      time: '2025-08-01T06:43:03Z'
  namespace: swongpai-virt
  finalizers:
    - kubevirt.io/virtualMachineControllerFinalize
  labels:
    app: myvmi
    kubevirt.io/dynamic-credentials-support: 'true'
    vm.kubevirt.io/template: fedora-server-small
    vm.kubevirt.io/template.namespace: openshift
    vm.kubevirt.io/template.revision: '1'
    vm.kubevirt.io/template.version: v0.32.2
spec:
  dataVolumeTemplates:
    - apiVersion: cdi.kubevirt.io/v1beta1
      kind: DataVolume
      metadata:
        creationTimestamp: null
        name: fedora-harlequin-gull-40
      spec:
        sourceRef:
          kind: DataSource
          name: fedora
          namespace: openshift-virtualization-os-images
        storage:
          resources:
            requests:
              storage: 30Gi
  runStrategy: RerunOnFailure
  template:
    metadata:
      annotations:
        vm.kubevirt.io/flavor: small
        vm.kubevirt.io/os: fedora
        vm.kubevirt.io/workload: server
      creationTimestamp: null
      labels:
        kubevirt.io/domain: fedora-harlequin-gull-40
        kubevirt.io/size: small
        network.kubevirt.io/headlessService: headless
    spec:
      architecture: amd64
      domain:
        cpu:
          cores: 1
          sockets: 1
          threads: 1
        devices:
          disks:
            - disk:
                bus: virtio
              name: rootdisk
            - disk:
                bus: virtio
              name: cloudinitdisk
          interfaces:
            - macAddress: '02:46:b8:00:00:0a'
              masquerade: {}
              model: virtio
              name: default
          logSerialConsole: false
          rng: {}
        features:
          acpi: {}
          smm:
            enabled: true
        firmware:
          bootloader:
            efi: {}
        machine:
          type: pc-q35-rhel9.4.0
        memory:
          guest: 2Gi
        resources: {}
      hostname: hello2
      networks:
        - name: default
          pod: {}
      subdomain: headless
      terminationGracePeriodSeconds: 180
      volumes:
        - dataVolume:
            name: fedora-harlequin-gull-40
          name: rootdisk
        - cloudInitNoCloud:
            userData: |-
              #cloud-config
              user: fedora
              password: 713b-d5pc-ne7j
              chpasswd: { expire: False }
          name: cloudinitdisk
status:
  conditions:
    - lastProbeTime: null
      lastTransitionTime: '2025-08-01T06:43:03Z'
      status: 'True'
      type: Ready
    - lastProbeTime: null
      lastTransitionTime: null
      message: All of the VMI's DVs are bound and not running
      reason: AllDVsReady
      status: 'True'
      type: DataVolumesReady
    - lastProbeTime: null
      lastTransitionTime: null
      status: 'True'
      type: LiveMigratable
    - lastProbeTime: null
      lastTransitionTime: null
      status: 'True'
      type: StorageLiveMigratable
    - lastProbeTime: '2025-07-31T04:43:21Z'
      lastTransitionTime: null
      status: 'True'
      type: AgentConnected
  created: true
  desiredGeneration: 10
  observedGeneration: 10
  printableStatus: Running
  ready: true
  runStrategy: RerunOnFailure
  volumeSnapshotStatuses:
    - enabled: true
      name: rootdisk
    - enabled: false
      name: cloudinitdisk
      reason: 'Snapshot is not supported for this volumeSource type [cloudinitdisk]'