Yeelight not resetting

Hi,

It’s been two months since a purchased the bulb. It was working perfectly with another 3 bulbs. Then suddenly it turned off. I tried to reset all of them and link them to one group. All of them responded the the reset except one. I took it to another room with a separate power switch but didn’t work all what I get is when I turn the switch on it stay off but when I (turn off) it flickers once and turns off again.

Bulb name: Mi LED Smart Bulb ( white and color)
Model: MJDP02YL