Document.FromAttributeMap(item) all propertries empty objects

[itaikta]

I'm using IAmazonDynamoDB.QueryAsync(request) to query and filter on an index.
Now, in trying to cast the result to my model type, I'm doing the following:

var item = response.Items.First(); // I have the required checks to make sure this is valid
_logger.LogInformation(JsonSerializer.Serialize(item));

var itemAsDocument = Document.FromAttributeMap(item);
_logger.LogInformation(itemAsDocument.ToJason());

The first log comes out exactly as I would except with all the data filled in and correct.

{
  "endDate": {
          "B": null,
          "BOOL": null,
          "IsBOOLSet": false,
          "BS": null,
          "IsBSSet": false,
          "L": null,
          "IsLSet": false,
          "M": null,
          "IsMSet": false,
          "N": null,
          "NS": null,
          "IsNSSet": false,
          "NULL": null,
          "S": "2026-06-22T11:34:16.5945963+00:00",
          "SS": null,
          "IsSSSet": false
      },
      // ETC....
}

The second log shows an object with all of it's properties as empty objects:

{
    "endDate": {},
    // ETC....
}

I have spent now numerous hours searching and prompting AI for why the document serializaion isn't working propery to no avail. Any guidance would be appreciated. Thank you!