One Lamp socket in the group do not turn on/off with the others

I have three lamp socket installed, One of them is not sync with the others, Sometimes it do not turn on, sometime it do not turn off. I restart the v3 camera and the lamp power, it become work, but some days later, it do not sync with the other sockets again. My house is not a big house, the distance between each socket is less then 6 meters。 Have submitted a log #668586