Is the ’One’ disconnecting from a wired, or wireless network, or just losing its connection with your controller device? - what is happening exactly?

If you mean dropping from your wireless network - then perhaps provide details of:

• Make/model of router?
• Wifi Channels in use and channel-width settings?
• Any other wireless access points?
• Other Sonos products on the network and if any are wired?
• Type of controller and the OS running on the device?

Because of your WiFi. See