Apologies if this is a repeat thread or in the wrong location. I was recently able to upgrade to fiber internet through AT&T. When receiving the new router, I was able to keep the SSIDs and other connection details, which was nice. What wasn’t great was that, after the new router was in place, all (or almost all) devices are constantly going offline: Kasa switches periodically cycle between indicators, Amazon notifies that devices had been offline, etc. I thought it might be a 2.4ghz channel issue, but it doesn’t seem to be the case since I just switched to the router’s (Humax BGW320-500) wifi channel 11 and SmartThings hub (v3 US) ZigBee channel 11, but I’m still seeing all my Kasa switches blinking. I have had my hub connected to the past and current router via ethernet. Happy to share additional information if it would help. I have a few dozen devices and, while it wouldn’t be terrible to remove all and reconfigure, I’d like to see if the community could help me find the root issue.
Thanks and happy new year!