EnvoyProxy in EnvoyGateway without type cause infra error

[zirain]

Repo configurations:

apiVersion: v1
kind: ConfigMap
metadata:
  name: envoy-gateway-config
  namespace: envoy-gateway-system
data:
  envoy-gateway.yaml: |
    apiVersion: gateway.envoyproxy.io/v1alpha1
    kind: EnvoyGateway
    provider:
      type: Kubernetes
      kubernetes:
        deploy:
          type: GatewayNamespace
        # increase the replicas of the rate limit deployment to 2,
        # this is to test the rate limit service discovery with multiple replicas.
        rateLimitDeployment:
          replicas: 2
    gateway:
      controllerName: gateway.envoyproxy.io/gatewayclass-controller
    envoyProxy:
      provider:
        # type: Kubernetes # without this line, there will be an error in controller
        kubernetes:
          envoyDeployment:
            container:
              resources:
                limits:
                  cpu: 200m
                  memory: 200Mi
                requests:
                  cpu: 1m
                  memory: 1Mi
    extensionApis:
      enableEnvoyPatchPolicy: true
      enableBackend: true
      enableLua: true
      enableSDSSecretRef: true
    gatewayAPI:
      enabled: [XListenerSet]
    rateLimit:
      backend:
        type: Redis
        redis:
          url: redis.redis-system.svc.cluster.local:6379
    telemetry:
      traces:
        sink:
          type: OpenTelemetry
          openTelemetry:
            host: otel-collector.monitoring.svc.cluster.local
            port: 4317
            protocol: grpc
        samplingRate:
          numerator: 100

[zirain]

when using CRD, the validation will return:

The EnvoyProxy "proxy-config" is invalid: 
* spec.provider.type: Required value