Yeelight C2001 wifi problem

Hi, I just bought new Yeelight C2001 S500 supporting Apple homekit on IOS.
But I’ve noticed that it goes off-line very frequently.
There’s no information about this new model, so I’m very frustrated.
I’ve own some other Yeelight models before (ceiling light, color light bulb and light strip), but they didn’t have such a problems yet under the same network system.
Could this problem get well with a firmware update or something?