@David-TP Not really. the optimization section says what needs to be optimized .then after the error comes out. repeated optimization takes a long time and then writes optimization is not needed

@David-TP I gave feedback through the app. in version 1.2.8 , the Network Optimization functionality freezes . and access points need to be reset / [Ticket#10602226]

@David-TP in all firmware versions, the problem is that after optimization (the latest iOS test version), the router occupies the busiest channel. a huge ping . the application says that everything...

@David-TP Yes, i try . Same error - APP prompt "Please add 2.4ghz in MAIN NETWORK"

@David-TP i have IoT network with legacy WPA 2.4 device. My Main Network -5ghz only . when i try add smart home function (TAPO DEVICE) in APP 3.0 => program promt me ,to use 2.4/5ghz in main network....

@DCdane https://www.tp-link.com/en/support/download/deco-x20/ only for old V1 , V4 no firmware 1.1