The "openaiFileIdRefs" property is not working properly

Hello,

I’ve followed the steps described in here:
https://platform.openai.com/docs/actions/sending-files

But when I test the action with an image, the property is never sent and the request body is received at my api empty, bellow I’ve added an example of my current config:

{
  "openapi": "3.1.0",
  "info": {
    "title": "Get data from Lambda",
    "description": "Retrieves data from the AWS Lambda URL.",
    "version": "v1.0.0"
  },
  "servers": [
    {
      "url": "https://webhook.site/5752fa31-ac98-4967-958e-907eef8052a5"
    }
  ],
  "paths": {
    "/teste": {
      "post": {
        "description": "Get data from the Lambda endpoint",
        "operationId": "GetLambdaData",
        "deprecated": false,
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "openaiFileIdRefs": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    },
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Images processed successfully."
          }
        }
      }
    }
  },
  "components": {
    "schemas": {}
  }
}