Sonos One CONSTANTLY loses Alexa

I tried contacting Zen tech support. They said the FRITZ!Box router had two channels and maybe this was confusing the Sonos One so they have turned one of them off, or hidden it or something. I’ve reset the Sonos One (again!) and keeping my fingers crossed this fix will work.

It’s frustrating when it won’t respond to my voice commands to actively do something like play music, but even worse when it doesn’t respond to commands to STOP doing something like playing music - so embarassing if I have to take a work call and the only solution is to go over to the device and turn it off at the mains

You need to reserve the IP addresses in the router before rebooting. I know it's a pain but it's something that you only have to do once. 

That doesn’t answer my question from earlier, though. Do you have to disable every wi-fi enabled device in the house BEFORE rebooting the router?

And your most recent answer and the linked suggests somehow we have to go into the router’s control panel to reserve addresses for particular devices. How do you do that? That’s not something I’ve ever done.

Can you confirm your router make and model and I'll try to help.

The best order is to reserve addresses, reboot the router and then connected devices.

Hi UKMedia. We have a FRITZ!Box 7530.

I’ve now reset all the devices in the house and the Sonos One definitely is not using the same IP address as any other network device (I’m looking at them all now on IP Scanner).

Is the problem fixed now?

In the manual here on page 141 - Always assigning the same IPv4 address.  This shows how to reserve an IP address.

Thanks UKMedia. It’s working fine at the moment. Let’s give it a couple of days to see how it goes.

I’ve been having the same issue since last week. Every day, when I ask Alexa something, it tells me I have to relink Alexa. Haven’t had many positive experiences with my Sonos one since the update mid year. 

Sorry to hear that, David. I’ve had more explanations than I can count from Sonos advisers - a recent one was that my Sonos One might be using the same ISP address as another device on my network, so I had to reinstall and reconfigure every device in the house (only to discover that this wasn’t the problem and realistically never would have been). I finally got through to someone who did have a good understanding of the issue - he posited that something in the same room was interfering with the Sonos One signal, and then proved it using diagnostics from the app. No idea why no thought of that before but I feel like I am making progress now!  I was also sent this in case it helps https://support.sonos.com/s/article/3286?language=en_US

Still not sure why it appears to be mainly Zen Internet customers with FRITZ!Box routers who are affected, though. Does that apply to you?