I can't make the LGP stop while recording under PC-free mode

Situation:

'On start-up it boots up to the solid red color, and I can press the hot button to begin recording which starts the red 'breathing' LED lights.
However, after that, I cannot stop recording by pressing the hot button, and the only way to stop the 'breathing' red light, is to turn off my console, or switch it to another mode. Every time I've tried, I end up not having any recordings saved.'
Am I doing something wrong or some firmware issue/defective unit?

Why & solution:

It keeps rotating the light quickly in PC-Free mode is because of Wii U's power supply. We have found that some Wii U (certain versions of its firmware) are not capable enough for powering sufficient/stable current to operate LGP correctly, so we recommend you to use the included USB2.0 cable & insert your LGP into another stable power supply (e.g. portable power supply, PC, or your laptop) to keep LGP from potential malfunction.