Bug when faking static methods with generics (5.2.2)

    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            Class1 c = Isolate.Fake.Instance<Class1>();
            c1 x1 = new c1();
            Isolate
                .WhenCalled<c1>(() => c.Method<c1>())
                .WillReturn(x1);
            c2 x2 = new c2();
            //next line throws exception:
            //Test method TestProject1.UnitTest1.TestMethod1 threw exception:  
            //System.Reflection.TargetInvocationException: 
            // Exception has been thrown by the target of an invocation. --->  
            // System.InvalidCastException: Unable to cast object
            // of type 'TestProject1.c1' to type 'TestProject1.c2'..
            Isolate
                .WhenCalled<c2>(() => c.Method<c2>())
                .WillReturn(x2);
            Assert.AreEqual(x1, c.Method<c1>(), "first");
            Assert.AreEqual(x2, c.Method<c2>(), "second");
        }
    }
    public class Class1
    {

        public T Method<T>() where T : class, new()
        {
            T c = new T();

            return c;
        }
    }

    public class c1
    {
    }
    public class c2
    {
    }

        [TestMethod]
        public void TestMethod2()
        {
            MockManager.Init();
            Mock mock = MockManager.Mock<Class1>();
            c1 x1 = new c1();
            mock.ExpectAndReturn("Method", x1, typeof(c1));
            c2 x2 = new c2();
            mock.ExpectAndReturn("Method", x2, typeof(c2));

            Class1 c = new Class1();

            Assert.AreSame(x1, c.Method<c1>(), "first");
            Assert.AreSame(x2, c.Method<c2>(), "second");