Best answer by Jeff S
Welcome to the community and thanks for sending in the report. Please start by rebooting your router and Sonos One. Once they are back online, see if you can change the wireless channel your router is using to 11, as there's a bit of interference from nearby networks on the current channel.
Try those out, and see if that helps. If not, send along a new diagnostic report and reply here with the number, I'll take a look.