JmesPath : invalid result, maybe related to projection

[L3Z4]

I'm trying to apply this expression to the following document

length((components[?type == 'Stepper'].children | @[].validationState)[?@ == 'NotValid']) == `0`

{
  "components": [
    {
      "type": "Stepper",
      "children": [
        {
          "validationState": "NotValid"
        },
        {
          "validationState": "Valid"
        }
      ]
    }
  ]
}

The expected result should be "false", as it is the actual value returned by the online tester https://jmespath.org/.

var text = File.ReadAllText(Path.Combine("test_files", "projection_issue.json"));
var jsonOptions = new JsonDocumentOptions();
jsonOptions.CommentHandling = JsonCommentHandling.Skip;
using JsonDocument doc = JsonDocument.Parse(text, jsonOptions);

var expression = JsonTransformer.Parse("length((components[?type == 'Stepper'].children | @[].validationState)[?@ == 'NotValid']) == `0`");
var result = expression.Transform(doc.RootElement);
Assert.IsFalse(result.RootElement.GetBoolean());

This unit test is currently failing.