How to disable/lock Ubook Pro Keyboard

Is the Ubook Pro keyboard supposed to lock when folded behind the tablet or when using tablet mode in Windows? If it does not have that feature, is there a key combination that will lock or disable it (similar to FN ESC for the touch pad)?
The driver does not have the disable option, and it is annoying that when the keyboard is folded the keys are still active and can easily produce undesired inputs. For me this issue significantly reduces the usability of the device.

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