Istio 1.5 EnvoyFilter Request Header Removal Not Working

Networking
1

I want to remove some headers when the traffic comes from 80 or a specified port alone but even after the envoy filter still the header exists in the application. I even have the sidecars injected in the pods could someone tell whats wrong in this ?

kind: EnvoyFilter
metadata:
  name: filter-headers
spec:
  configPatches:
  - applyTo: HTTP_FILTER
    match:
      context: SIDECAR_INBOUND
      listener:
        portNumber: 80
        filterChain:
          filter:
            name: "envoy.http_connection_manager"
            subFilter:
              name: "envoy.router"
    patch:
      operation: INSERT_BEFORE
      value: # lua filter specification
       name: envoy.lua
       typed_config:
        "@type": "type.googleapis.com/envoy.config.filter.http.lua.v2.Lua"
        inlineCode: |
          function envoy_on_request(request_handle)
            request_handle:headers():remove("X-Forwarded-Prefix")
          end