I have deployed Open Distro using a modified Helm chart from myself

The Kibana kubernetes service looks like

apiVersion: v1
kind: Service
metadata:
  annotations:
  creationTimestamp: "2019-09-05T15:29:04Z"
  labels:
    app: opendistro-es
    chart: opendistro-es-1.0.0
    heritage: Tiller
    release: opendistro-es
  name: opendistro-es-kibana
  namespace: elasticsearch
  resourceVersion: "48313341"
  selfLink: /api/v1/namespaces/elasticsearch/services/opendistro-es-kibana
  uid: e5066171-cff1-11e9-bb87-42010a8401d0
spec:
  clusterIP: 10.15.246.245
  ports:
  - name: opendistro-es-kibana
    port: 443
    protocol: TCP
    targetPort: 5601
  selector:
    app: opendistro-es-kibana
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}

and the pod looks like

apiVersion: v1
kind: Pod
metadata:
  annotations:
    checksum/config: a4af5a55572dd6587cb86b0e6b3758f682c23745ad114448ce93c19e9612b6a
  creationTimestamp: "2019-09-05T15:29:04Z"
  generateName: opendistro-es-kibana-5f78f46bb-
  labels:
    app: opendistro-es-kibana
    chart: opendistro-es-1.0.0
    heritage: Tiller
    pod-template-hash: 5f78f46bb
    release: opendistro-es
  name: opendistro-es-kibana-5f78f46bb-8pqfs
  namespace: elasticsearch
  ownerReferences:
  - apiVersion: apps/v1
    blockOwnerDeletion: true
    controller: true
    kind: ReplicaSet
    name: opendistro-es-kibana-5f78f46bb
    uid: e4a7a0fe-cff1-11e9-bb87-42010a8401d0
  resourceVersion: "48313352"
  selfLink: /api/v1/namespaces/elasticsearch/pods/opendistro-es-kibana-5f78f46bb-8pqfs
  uid: e4acd8b3-cff1-11e9-bb87-42010a8401d0
spec:
  containers:
  - env:
    - name: CLUSTER_NAME
      value: elasticsearch
    image: amazon/opendistro-for-elasticsearch-kibana:1.0.2
    imagePullPolicy: IfNotPresent
    name: opendistro-es-kibana
    ports:
    - containerPort: 5601
      protocol: TCP
    resources:
      limits:
        cpu: 2500m
        memory: 2Gi
      requests:
        cpu: 500m
        memory: 512Mi
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /usr/share/kibana/config/kibana.yml
      name: config
      subPath: kibana.yml
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: opendistro-es-kibana-token-9g8mq
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  nodeName: gke-ehealth-africa-d-concourse-ci-poo-98690882-h3lj
  priority: 0
  restartPolicy: Always
  schedulerName: default-scheduler
  securityContext: {}
  serviceAccount: opendistro-es-kibana
  serviceAccountName: opendistro-es-kibana
  terminationGracePeriodSeconds: 30
  tolerations:
  - effect: NoExecute
    key: node.kubernetes.io/not-ready
    operator: Exists
    tolerationSeconds: 300
  - effect: NoExecute
    key: node.kubernetes.io/unreachable
    operator: Exists
    tolerationSeconds: 300
  volumes:
  - configMap:
      defaultMode: 420
      name: opendistro-es-security-config
    name: security-config
  - name: config
    secret:
      defaultMode: 420
      secretName: opendistro-es-kibana-config
  - name: opendistro-es-kibana-token-9g8mq
    secret:
      defaultMode: 420
      secretName: opendistro-es-kibana-token-9g8mq

Unfortunately when I try and curl the Kibana service name I get connection refused

curl: (7) Failed connect to opendistro-es-kibana:443; Connection refused

When I use

kubectl port-forward svc/opendistro-es-kibana 5601:443

I'm able to access Kibana

Any pointers of what I'm missing would be very much appreciated!