newtonsoft not deserializing double values in inner class correctly

I'm working with .NET 5 and Api Controllers. In my startup class (ConfigureServices) I have the following:

services.AddControllers().AddNewtonsoftJson(x =>
            {
                x.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
            });

Then I have a controller like this:

[HttpPost]
public async Task<ActionResult<Company>> PostCompany(Company company)
{
}

And Company is a class like this

public class Company : Entity
    {
        Coordinates coordinates;
        public int CompanyId { get; set; }
        public string Name { get; set; }
        public NpgsqlTypes.NpgsqlBox Bounds { get; set; }
        [NotMapped]
        public Coordinates Coordinates
        {
            get { return coordinates ?? new Coordinates(); } 
            set { coordinates = value; Bounds = new NpgsqlTypes.NpgsqlBox(coordinates.Top, coordinates.Right, coordinates.Bottom, coordinates.Left); }  
        }
    }

    public class Coordinates
    {
        public double Left { get; set; }
        public double Right { get; set; }
        public double Bottom { get; set; }
        public double Top { get; set; }
    }

From postman I send a POST with this body (Content-Type: application/json in the Headers)

{
   "companyId":0,
   "name":"company 1",
   "coordinates":{
      "left":2,
      "right":5,
      "bottom":43,
      "top":3
   }
}

name has the correct value but why coordinates in the parameter of the api controller is always 0 in all its values? Seems it's newtonsoft deserialization because if I use this

public async Task<ActionResult<Company>> PostCompany(Object company2)
{
    var jsonString = company2.ToString();
    Company company = JsonConvert.DeserializeObject<Company>(jsonString);
}

I see the coordinates values in the company2 but not when deserialized into company object (which has 0 for all the coordinates).

Any idea? Thanks in advance. Guillermo.