HC13_NonNull_Violation_Issue

Minimal Repo to demonstrate possible issue with HotChocolate 13.2.1 non null violation handling

Guided by the Video from Michael https://youtu.be/Zx0nvTUfjn4 on Non-Nullability and Error Handling, i would expect that

public class Query
{
    public Person GetPerson() => new("Luke Skywalker")
    {
        Children = new List<Person>()
        {
            new("Anakin Skywalker"),
            // why does HC 13.2.1 null out children field when a child is null
            // but the response doesn't contain an error property??!
            null
        }
    };
}

public class Person
{
    public Person(string name)
    {
        Name = name;
    }

    public string Name { get; }

    public ICollection<Person>? Children { get; set; }
}

results in a response with partial valid data (children field nulled becaus it contains an invalid null value) and an error node. But the produced response does only contain the partial valid data, but no error hint

{
  "data": {
    "person": {
      "name": "Luke Skywalker",
      "children": null
    }
  }
}

Has something changed since the video was made? Do we have to opt-in to error information now?