Bugs in Isolated as Class Parameter with Generics

    public class GetPrjClass<T>
        where T: class 
    {
        private static string GetPrj()
        {
            throw new NotImplementedException();
        }

        public T RunPrj(string strAA)
        {
            var prjFile = GetPrj();
            return null;
      
        }


    }

    public class GetPrjClass2
    {
        private static string GetPrj()
        {
            throw new NotImplementedException();
        }

        public string RunPrj(string strAA)
        {
            return GetPrj();
           
         
        }     
    }

    public class UserInfo
    {
        public string Name
        { get; set; }
    }
    [TestFixture, Isolated]
    public class ClearMocksTest
    {
        private GetPrjClass<UserInfo> PrjClass;
        private GetPrjClass2 PrjClass2;


        [SetUp]
        public void Init()
        {
            PrjClass = Isolate.Fake.Instance < GetPrjClass<UserInfo>>(Members.CallOriginal);
            PrjClass2 = Isolate.Fake.Instance<GetPrjClass2>(Members.CallOriginal);
        }
        [TestCase("a")]
        [TestCase("b")]
        public void OhPrjClass(string aa)
        {
            Isolate.NonPublic.WhenCalled(PrjClass.GetType(),
                "GetPrj").WillReturn("");
     
            PrjClass.RunPrj(aa);
            
        }

        [TestCase("a")]
        [TestCase("b")]
        public void OhPrjClass2(string aa)
        {
            Isolate.NonPublic.WhenCalled(PrjClass2.GetType(),
                "GetPrj").WillReturn("");

            PrjClass2.RunPrj(aa);

        }
    }

TestCase 'OhPrjClass("b")' failed: System.NotImplementedException : The method or operation is not implemented.
   C:Documents and SettingsSoon Hui.ESTEEMSOFTMy DocumentsjobspresentationTypemockWinFormWinFormTestClearMocksTest.cs(15,0): at WinFormTest.GetPrjClass`1.GetPrj()
   C:Documents and SettingsSoon Hui.ESTEEMSOFTMy DocumentsjobspresentationTypemockWinFormWinFormTestClearMocksTest.cs(20,0): at WinFormTest.GetPrjClass`1.RunPrj(String strAA)
   C:Documents and SettingsSoon Hui.ESTEEMSOFTMy DocumentsjobspresentationTypemockWinFormWinFormTestClearMocksTest.cs(68,0): at WinFormTest.ClearMocksTest.OhPrjClass(String aa)
   at TypeMock.MockManager.a(String A_0, String A_1, Object A_2, Object A_3, Boolean A_4, Object[] A_5)
   at TypeMock.InternalMockManager.getReturn(Object that, String typeName, String methodName, Object methodParameters, Boolean isInjected, Object p1)
   C:Documents and SettingsSoon Hui.ESTEEMSOFTMy DocumentsjobspresentationTypemockWinFormWinFormTestClearMocksTest.cs(64,0): at WinFormTest.ClearMocksTest.OhPrjClass(String aa)


3 passed, 1 failed, 0 skipped, took 1.73 seconds.