@OrangeStreet I had this happen one time... I had to reboot the router and controller. It worked. I assumed it was a fluke. Maybe it isnt.

@Jonny-Five-O -85 is horrible signal... I would make sure your wireless clients are sitting around -50 to -65. Sonos have very weak wireless cards... so -60's would be best for it.

@Jonny-Five-O Sonos is very very cumbersome against networks... they run on Multicasting Streams. I would suggest getting a Omada router that runs mDNS. If you get a ER605, buy the V2 (not the V1)....

@Jonny-Five-O Can you give us more details on your network? Router, switch, APs are you using?

@AurelioS Upgrade the firmware of your router to 1.4.0 and retest. https://community.tp-link.com/en/business/forum/topic/621532 Also update your Controller Appliance

@SusP Since this is happening on the Wireless and Wired, I would a few things: Upgrade to 2.1.5 and retest: https://community.tp-link.com/en/business/forum/topic/634790 Does the controller alert logs...