CEL integration: Resource timeout does not work

Elastic Stack Elastic Agent
1

Hi

I have a kibana custom resource with CEL integration like this:

apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: kibana
  namespace: kibana
spec:
  version: 8.13.2
...
  config:
...
    xpack.fleet.agentPolicies:
...
      - name: CEL policy
        id: eck-agent
        namespace: kibana
....
        package_policies:
          - name: cel-loki-policy
            id: cel-loki-policy
            package:
              name: cel
            namespace: kibana
            inputs:
              - type: cel
                streams:
                  - enabled: true
                    data_stream:
                      type: logs
                      dataset: "cel.cel"
                    vars:
                      - name: "data_stream.dataset"
                        value: "cel.loki-stream"
                      - name: "resource_url"
                        value: "http://loki-gateway:80/loki/api/v1/query_range"
                      - name: "state"
                        value: |
                          { "some state" }
                      - name: "program"
                        value: |
                          // some cel code
                      - name: "resource_timeout"
                        value: "5m"

Everything works fine. But if there is a heavy request that couldn't be completed in 30 seconds, Client.Timeout errors occur:

{
  "log.level": "error",
  "@timestamp": "2024-04-18T21:05:46.292+0200",
  "message": "request failed",
  "component": {
    "binary": "filebeat",
    "dataset": "elastic_agent.filebeat",
    "id": "cel-default",
    "type": "cel"
  },
  "log": {
    "source": "cel-default"
  },
  "log.origin": {
    "file.line": 553,
    "file.name": "go-retryablehttp@v0.6.6/client.go",
    "function": "github.com/hashicorp/go-retryablehttp.(*Client).Do"
  },
  "ecs.version": "1.6.0",
  "log.logger": "input.cel.retryablehttp",
  "input_url": "http://loki-gateway:80/loki/api/v1/query_range",
  "error": {
    "message": "Get \"http://loki-gateway:80/loki/api/v1/query_range?direction=forward&limit=2&query=_REDUCTED_QUERY_&start=1712582033740144385\": net/http: request canceled (Client.Timeout exceeded while awaiting headers)"
  },
  "url": "http://loki-gateway:80/loki/api/v1/query_range?direction=forward&limit=2&query=_REDUCTED_QUERY_&start=1712582033740144385",
  "service.name": "filebeat",
  "id": "cel-cel.cel-cel-loki-stream",
  "input_source": "http://loki-gateway:80/loki/api/v1/query_range",
  "method": "GET"
}

Is this the bug or the configuration error?

....
                    vars:
...
                      - name: "resource_timeout"
                        value: "5m"