ServiceStack HttpError.NotFound bug when using DELETE method

program.cs

using System;
using Funq;
using ServiceStack;

namespace V4
{
	class MainClass
	{
		public static void Main()
		{
			// Simple Self-Hosted Console App
			var appHost = new AppHost(500);
			appHost.Init();
			appHost.Start("http://*:9000/");
			Console.ReadKey();
		}
	}

	public class AppHost : AppHostHttpListenerPoolBase
	{
		public AppHost(int poolSize) : base("Test Service", poolSize, typeof(TestService).Assembly) 
		{ 
		}

		public override void Configure(Container container)
		{
			SetConfig(new HostConfig { 
				DebugMode = true
			});
		}
	}

	[Route("/Test1", "DELETE")]
	public class Test1Request {}

	[Route("/Test2", "DELETE")]
	public class Test2Request {}

	[Route("/Test3", "DELETE")]
	public class Test3Request {}

	public class TestService : Service 
	{
		public string Delete(Test1Request request)
		{
			// Works as expected
			return "hello";
		}

		public string Delete(Test2Request request)
		{
			// Shows a handler not found error instead of custom 404??
			throw HttpError.NotFound("No such record");
			return "hello";
		}

		public string Delete(Test3Request request)
		{
			// Works as expected
			throw HttpError.Unauthorized("Unauthorized");
			return "hello";
		}
	}
}