Isolate.Invoke.Event throws TypeMockException

I have the following code which i am using to try and mock an event:

    public class ClassWithEvent
    {
        public event EventHandler<EventArgs> MyEvent;
    }

    [TestMethod, Isolated]
    public void MockMyEvent()
    {
        var myClass = Isolate.Fake.Instance<ClassWithEvent>();

        bool hasBeenCalled = false;

        myClass.MyEvent += (sender, args) => { hasBeenCalled = true; };

        Isolate.Invoke.Event(() => myClass.MyEvent += null, EventArgs.Empty);

        Assert.IsTrue(hasBeenCalled);
    }

When run, the test fails due to a TypeMockException being thrown: