Once or twice a year everything stops working or non-responsive.

I have around 50+ devices from Cam, plugs, switches, bulbs, light strips etc.  All grayed out. Sometimes things get online and when you activate on the app the button starts spin around.

I can setup a cam and all good, for then 10 min later it is "Off line" and green light blinking, same goes with any KASA device just drop out.

No change on the network, not even been off line, no power drop out no nothing. My grid and topology is very stable and with a high end router from ASUS and I have a logger on so I can see if the network gets unstable and no sign of anything.

I've got more than 200Mbps measured with each device so pretty strong wifi signal and the setting accepts N and Legacy as well as 20/40MHz, channel control and extensions are on auto so no fixed preset.  

I've got non KASA items on the network and they works like a charm only the KASA devices are a complete melt down.

For a week I had the issue now, and even I reset everything twice , things are dropping out again. I also did reset the whole 2.4G network in fact started up from scratch.

I am really frustrated as I've spend quite a bit of money and things are just not working stable and consistent.

As said it happens twice a year and I am almost giving up on KASA as it is not reliable and why I'm letting go off KASA and slowly replacing with an other brand.

I realized I bought too cheap and thought TP Link was good quality, I stand corrected. What I have there is working is not a $25 dimmer but a $50+ and absolute no issues and you can actually have a face plate for two or more switches. But it takes awhile when it is 50+ devices to replace.