Headers Are Being Passed with a map Object

[Touseef-ahmad]

Description:
I have encountered an issue where the Authorization header is being passed within a map object instead of directly in the headers. This is preventing the proper transmission of the headers in requests. The headers object looks like:

{
  "headers": {
    "map": {
      "authorization": "Bearer <token>"
    }
  }
}

This structure is causing issues because the expected format should be:

{
  "headers": {
      "authorization": "Bearer <token>"
  }
}

const baseQuery = fetchBaseQuery({
  baseUrl: API_BASE_URL,
  prepareHeaders: (headers, {getState}) => {
    const access_token = (getState() as RootState).auth.access;
    if (access_token) {
      headers.set('Authorization', `Bearer ${access_token}`);
    }
    return headers;
  },
  headers: {
    'Content-Type': 'application/json',
  },
});

Using this with "react-native": "0.76.5", "@reduxjs/toolkit": "^2.5.0",

[markerikson]

RTKQ does not have any code that would do that. Can you provide a repro of this happening?