Went in to hub to separate 2 Ghz and 5 Ghz but when saved it nothing connected Properly again ,.smart Power Strip plug and a kettle the main ones everything esle seemed to recont them self's
When the SSID is changed for either the 2.4Ghz band or the 5Ghz band any connected devices do become disconnected from the band or bands that have changed SSID name.
All the disconnected devices now need to be re-connected to the new SSID just like it was a first time install.