.NET 10 System.Text.Json duplicates rejection

Program.cs

using System.Text.Json;

// Payload with a duplicated "Value" key
string json = "{ \"Value\": 1, \"Value\": -1 }";

var options = new JsonSerializerOptions
{
    // Reject duplicates option
    AllowDuplicateProperties = false
};

try
{
    var result = JsonSerializer.Deserialize<MyRecord>(json, options);
}
catch (JsonException ex)
{
    Console.WriteLine(ex.Message); // Throws due to duplicate property
}

public record MyRecord(int Value);