Header based routing does not work if original HTTP route has filters on it

[kostis-codefresh]

The header based routing example only works if the existing HTTP route has no filters.

This works

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: my-smart-route
spec:
  parentRefs:
    - name: traefik-gateway
      namespace: default
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /     
    backendRefs:
     - name: argo-rollouts-stable-service
       kind: Service
       port: 80
     - name: argo-rollouts-canary-service
       kind: Service
       port: 80

This does not work

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: my-smart-route
spec:
  parentRefs:
    - name: traefik-gateway
      namespace: default
  rules:
  - matches:
    - path:
        type: PathPrefix  
        value: /smart/ 
     filters:
       - type: URLRewrite
         urlRewrite:
           path:
             type: ReplacePrefixMatch
             replacePrefixMatch: / 
    backendRefs:
     - name: argo-rollouts-stable-service
       kind: Service
       port: 80
     - name: argo-rollouts-canary-service
       kind: Service
       port: 80

Full example is here.

When a header based http route is created it should copy all the properties from the original route (including filters)

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