Entry of endpoint changes after service entry has been added

• • ENVIRONMENT

• OCP version : 4.6.8
• Custer ID : 53b6185a-0e4a-4018-9b8b-53289c6dc75b
• Platform : baremetal
• OS : CoreOS
• Service Mesh : v2.0.1 (Istio 1.6.14)

• • ISSUE DESCRIPTION
    The endpoint port number changes few minutes after a ServiceEntry has been created on Service Mesh v2.0.1.

the following 'ServiceEntry' is created. It works fine for the first few minutes but then the port changes.

• When the service entry is just created.
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  istioctl proxy-config endpoint spring-boot-fileupload-v1-57fb68cd48-5hrbm.redhat-app-demo --address 172.30.213.38
  ENDPOINT STATUS OUTLIER CHECK CLUSTER
  172.30.213.38:8080 HEALTHY OK outbound|80||se-test.apps.ocp4.sbean.com
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• In few minutes after the creation
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  istioctl proxy-config endpoint spring-boot-fileupload-v1-57fb68cd48-5hrbm.redhat-app-demo --address 172.30.213.38
  ENDPOINT STATUS OUTLIER CHECK CLUSTER
  172.30.213.38:80 HEALTHY OK outbound|80||se-test.apps.ocp4.sbean.com <================ the port changed to 80
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

It may hit the following upstream issue, which is fixed in istio 1.8 latest release.

https://github.com/istio/istio/issues/25309