Frequent disconnects with Video Door Bell Pro

Disconnects every 3 to 5 minutes from internet and goes offline. Transformer upgraded to 24V provided by Ring. Has excellent internet connection from KPN. No loose connection in the wires. Played with WLAN settings 5 GHz and 2.4 GHz changing to lower channels and in Auto mode. Still won't work. Running out of ideas. Even got a professional electrician, he can't find any issues. It's a brand new piece. Kindly sughesy