Deserializing a record instance is causing child elements to be duplicated when using configuration binder Get<T> method

[rajasekarshanmugam]

When deserializing the configuration using the binder via configurationRoot.Get() method, some of the child elements are duplicated.

In the below code snipped:

using Microsoft.Extensions.Configuration;
using System.Text.Json;

public static class Program
{
	public static void Main()
	{
		var sample1 = new Root("root1", [new("c1", "c1n1", "c1n1value")]);
		var sampl1Json = sample1.ToJson();
		//Console.WriteLine(sampl1Json);

		var cbjson = new ConfigurationBuilder()
			//.AddJsonFile("appsettings.json", optional: false)
			.AddJsonStream(new MemoryStream(System.Text.Encoding.UTF8.GetBytes(sampl1Json)))
			.Build();

		var sample1copy = cbjson.Get<Root>();
		var sample1copyJson = sample1copy.ToJson();
		Console.WriteLine(sample1copyJson);
	}

	public record Root(string Id, ChildElement[] Elements);

	public record ChildElement(string Id, string Name, string Value);
}

file static class Utils
{
	static readonly JsonSerializerOptions _SERIALIZER = new()
	{
		WriteIndented = true
	};
	public static string ToJson<T>(this T obj) => JsonSerializer.Serialize<T>(obj, _SERIALIZER);
}

Actual output:

{
  "Id": "root1",
  "Elements": [
    {
      "Id": "c1",
      "Name": "c1n1",
      "Value": "c1n1value"
    },
    {
      "Id": "c1",
      "Name": "c1n1",
      "Value": "c1n1value"
    }
  ]
}

Expected Output:

{
  "Id": "root1",
  "Elements": [
    {
      "Id": "c1",
      "Name": "c1n1",
      "Value": "c1n1value"
    }
  ]
}

In the sample below, expected output is a child with just t

Runtimes Checked:
.NET runtime used: .NET 8 - 8.0.10, .NET RC2 - 9.0.100-rc.2.24474.11.

Environment Details:
.NET SDK:
Version: 9.0.100-rc.2.24474.11
Commit: 315e1305db
Workload version: 9.0.100-manifests.cea95dba
MSBuild version: 17.12.0-preview-24473-03+fea15fbd1

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.100-rc.2.24474.11\

[rajasekarshanmugam]

moved to dotnet/runtime#109139