ServiceStack Funq ReuseScope.Request injects same object instead of a new instance

I'm having a problem with ReuseScope.Request. I'm getting the same instance injected on every request even though I specify ReuseScope.Request. I configured the container using these two calls to get a MasterConfig:

this.container.RegisterAutoWiredAs<ApiConfigFactory, IConfigFactory>().ReusedWithin(ReuseScope.Container);
this.container.Register(c => c.Resolve<IConfigFactory>().GetMasterConfig(true)).ReusedWithin(ReuseScope.Request);

The GetMasterConfig(true) method returns a new concrete MasterConfig. However, when I try to use the MasterConfig in the service, I get the same instance on every request.

public class MyService
{
    private readonly MasterConfig masterConfig;

    public SaleService(MasterConfig masterConfig)
    {
        this.masterConfig = masterConfig;
    }

    public object Post(MyRequest request)
    {
        // **masterConfig is the same instance here on every request**
    }
}

If I change the scope on the MasterConfig Register to ReuseScope.None, I get a new MasterConfig loaded as expected. What am I missing? Is there a problem with the way I am registering MasterConfig? Why does ReuseScope.None fix the issue? Why does ReuseScope.Request give me the same instance?

Note:

I haven't been able to reproduce this in either a self-host or ASP.NET Host.

This works in the latest version of ServiceStack:

//AppHost
public class RequestScopeAppHost : AppSelfHostBase
{
    public RequestScopeAppHost() 
      : base(typeof(RequestScopeAppHost).Name, typeof(RequestScopeService).Assembly) {}

    private static int counter = 0;

    public override void Configure(Container container)
    {
        container.Register(c => new MasterConfig {
            Id = Interlocked.Increment(ref counter)
        }).ReusedWithin(ReuseScope.Request);
    }
}

Service:

public class MasterConfig
{
    public int Id { get; set; }
}

public class GetMasterConfig : IReturn<MasterConfig> { }

public class RequestScopeService : Service
{
    private readonly MasterConfig config;

    public RequestScopeService(MasterConfig config)
    {
        this.config = config;
    }

    public object Any(GetMasterConfig request)
    {
        return config;
    }
}

Test:

[TestFixture]
public class RequestScopeIssue
{
    private readonly ServiceStackHost appHost;

    public RequestScopeIssue()
    {
        appHost = new RequestScopeAppHost()
            .Init()
            .Start(Config.AbsoluteBaseUri);
    }

    [TestFixtureTearDown]
    public void TestFixtureTearDown()
    {
        appHost.Dispose();
    }

    [Test]
    public void Can_get_RequestScope_dependency()
    {
        var client = new JsonServiceClient(Config.AbsoluteBaseUri);

        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(1));
        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(2));
        Assert.That(client.Get(new GetMasterConfig()).Id, Is.EqualTo(3));
    }
}

In your description ReuseScope.None also works as intended, it doesn't re-use instances.