Yeelight devices Offline if you hide Wifi SSID

Hi! I have noticed that if you hide the wifi SSID, all yeelight devices appear as offline.

With the old yeelight 2.0 app I didn´t have this problem. Can you fix it? Thanks.

Also, I want to ask if you have patched the Wifi vulnerability, Key Reinstallation AttaCK or KRACK in all your yeelight products?. Thanks

Any help?