ASP.NET Core OData Action with complex type having stream always returns null for the stream

Having asp.netcore odata service that returns an action with the following complex type that has stream property.

public class customerResponse
{
    public string Id { get; set; }
    public Stream Photo{ get; set; }
    public string Name { get; set; }
}

Here is the EDM model that is constructed:

   var action = builder.EntityType<company>().Action("exportCustomers");
   action.CollectionParameter<string>("customerIds");       
   action.ReturnsCollection<customerResponse>().;

Now there is a odata controller class that implements the following

[HttpPost]
public List<customerResponse> exportCustomers([FromRoute] string key, ODataActionParameters parameters)
{
    IEnumerable<string> custIds = parameters["customerIds"] as IEnumerable<string>;
    byte[] byteArray = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    List<customerResponse> responses = new List<customerResponse>();
    foreach (string id in custIds)
    {
        customerResponse itemResponse = 
                  new customerResponse() { Id = id, Photo = new MemoryStream(byteArray, 
                                      0, 4), Name = "ABCD" };   
        responses.Add(itemResponse);
    }
    return responses;
}

In the above example after making the call, I always see the property Photo is not present. Only the Id and Name are present in the deserialized response.

Am I missing anything with respect to handling stream with Odata ?

Thanks