This code throws an unexpected TypeMockException

[TestClass, Isolated]
public class Tests
{
   public class A
   {
      public B B { get; private set; }

      public A()
      {
         B = new B();
         B.BMethod();
      }
   }

   public class B
   {
      public void BMethod()
      {
      }
   }

   [TestMethod]
   public void Test()
   {
      B bToSwap = Isolate.Fake.Instance<B>();
      Isolate.Swap.AllInstances<B>().With(bToSwap);
      //
      A a = Isolate.Fake.Instance<A>(Members.CallOriginal);
      //
      Isolate.Verify.WasCalledWithExactArguments(() => bToSwap.BMethod());
   }
}