Empty Response from server

I’m getting random Empty response from server
I have an ingress gateway service with a AWS NLB and SSL-Cert defined as annotations.
Also I have two gateways in differents namespaces

Any thoughts?
I don’t think that this would be the problem

Here I let you my settings.

apiVersion: v1
kind: Service
metadata:
  annotations:
    service.beta.kubernetes.io/aws-load-balancer-backend-protocol: http
    service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:...
    service.beta.kubernetes.io/aws-load-balancer-ssl-negotiation-policy: ELBSecurityPolicy-TLS-1-2-2017-01
    service.beta.kubernetes.io/aws-load-balancer-ssl-ports: https
    service.beta.kubernetes.io/aws-load-balancer-type: nlb
  finalizers:
  - service.kubernetes.io/load-balancer-cleanup
  labels:
    app: istio-ingressgateway
    install.operator.istio.io/owning-resource: default-istio-controlplane
    install.operator.istio.io/owning-resource-namespace: istio-system
    istio: ingressgateway
    istio.io/rev: default
    operator.istio.io/component: IngressGateways
    operator.istio.io/managed: Reconcile
    operator.istio.io/version: 1.9.1
    release: istio
  name: istio-ingressgateway
  namespace: istio-system
spec:
  externalTrafficPolicy: Cluster
  ports:
  - name: status-port
    nodePort: 31309
    port: 15021
    protocol: TCP
    targetPort: 15021
  - name: http2
    nodePort: 32141
    port: 80
    protocol: TCP
    targetPort: 8080
  - name: https
    nodePort: 30518
    port: 443
    protocol: TCP
    targetPort: 8443
  - name: tcp-istiod
    nodePort: 32171
    port: 15012
    protocol: TCP
    targetPort: 15012
  - name: tls
    nodePort: 32339
    port: 15443
    protocol: TCP
    targetPort: 15443
  selector:
    app: istio-ingressgateway
    istio: ingressgateway
  sessionAffinity: None
  type: LoadBalancer
---
apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: foo-gateway
  namespace: foo
spec:
  selector:
    app: istio-ingressgateway
  servers:
  - hosts:
    - foo.example.com
    port:
      name: http
      number: 80
      protocol: HTTP
    tls:
      httpsRedirect: true
  - hosts:
    - foo.example.com
    port:
      name: http-foo
      number: 443
      protocol: HTTP
---
apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: bar-gateway
  namespace: bar
spec:
  selector:
    app: istio-ingressgateway
  servers:
  - hosts:
    - bar.example.com
    port:
      name: http
      number: 80
      protocol: HTTP
    tls:
      httpsRedirect: true
  - hosts:
    - bar.example.com
    port:
      name: http-bar
      number: 443
      protocol: HTTP