Junqi Zhao I can't reproduce this. Please reopen if still relevant.

The CVO synced the mao service
I1125 09:03:02.498470       1 sync_worker.go:634] Done syncing for service "openshift-machine-api/machine-api-operator" (106 of 492)

How ever it still have the old ports

apiVersion: v1
kind: Service
metadata:
  annotations:
    exclude.release.openshift.io/internal-openshift-hosted: "true"
    service.alpha.openshift.io/serving-cert-secret-name: machine-api-operator-tls
    service.alpha.openshift.io/serving-cert-signed-by: openshift-service-serving-signer@1574643525
    service.beta.openshift.io/serving-cert-signed-by: openshift-service-serving-signer@1574643525
  creationTimestamp: "2019-11-25T00:57:06Z"
  labels:
    k8s-app: machine-api-operator
  name: machine-api-operator
  namespace: openshift-machine-api
  resourceVersion: "99725"
  selfLink: /api/v1/namespaces/openshift-machine-api/services/machine-api-operator
  uid: 808fab3a-0f1e-11ea-b0d6-0226aba6a282
spec:
  clusterIP: 172.30.86.189
  ports:
  - name: metrics
    port: 8080
    protocol: TCP
    targetPort: metrics
  selector:
    k8s-app: machine-api-operator
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}

*** Bug 1776725 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:0581