Wii U Off-tv play no keyboard on gamepad

when playing on the WiiU Gamepad in Off-TV mode, when trying to type anything the screen is stuck without having to plug in/switch back to the tv. So whenever trying to type anything on a sign, in a book, naming items in anvil, the keyboard only appears on the tv screen and not the gamepad. This makes it impossible to do any typing in game when playing only on the gamepad with no tv, effectively forcing the user to always be connected to a tv or to reset the system entirely to back out of the keyboard. I think there should be a keyboard pop up on the gamepad when using off tv-mode, rather then the keyboard showing on the tv.