Istio Integration failing with envoy upstream request timeout about emissary HOT 1 CLOSED

---
apiVersion: getambassador.io/v3alpha1
kind:  Mapping
metadata:
  name:  catch-all
  namespace: ambassador
spec:
  prefix: /
  hostname: "*"
  service: default-http-backend-svc:80
  tls: istio-upstream

---
apiVersion: v1
kind: Service
metadata:
  namespace: ambassador
  name: default-http-backend-svc
  labels:
    app.kubernetes.io/name: default-http-backend-svc
    app.kubernetes.io/version: "1.0"
spec:
  selector:
    app.kubernetes.io/name: default-http-backend
    app.kubernetes.io/version: "1.0"
  ports:
    - appProtocol: tcp
      name: tcp-80
      port: 80
      targetPort: 8080
    - appProtocol: tcp
      name: tcp-443
      port: 443
      targetPort: 8080