Yes, same here. It's a little difficult to do with the pen cover bulk ...Just realized that the cover must be flat against the back of the tablet to be disabled. If it is not touching the back cover you get uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuy
Interestingly a firmware update for the cover popped up and ever since the keyboard disables perfectly when flipped to the back ...