@Riley_S , Thank you very much for the information. I didn't manually do any firmware update so I think the firmware should be a working one. I have tried both hard and soft reset and also have tried...

A week ago, it's started to reset itself. Everytime, it's offline and blinking amber and green. After I hit + to add it back again, for like 10-30 minutes, it resets itself again as blinking amber...