Can you please elaborate on your scenario a bit more as I am not sure I understand the issue correctly. How do you switch the sides -manually through the SelectedIndex or by rotating the cube and clicking on a side?
I've prepared a sample solution where I tested the default behavior of the control and when I run the project I can rotate the cube around and click on each of its 6 sides. Please take a look at the solution and let me know if I'm missing something.
Thank you for getting back to us and elaboprating on the issue. Now I can better understand your case and question. Unfortunately this behavior is by design as the RadCube control doesn't let you select the side that was selected when the rotation was triggered.
And the first side of the Cube is considered as initially selected and this is why when the rotation starts automatically on start up, you need to select a side different from the first one and only then you'll be able to get back to the first side.