@Pjb1 hi, thank you, i cant hard wire them as not next to D9, in different rooms... I put guest network on, only 2.4 ghz and that seem to work... so i can keep seamless on main network on. Not sure...

@rickindc i having same issue with Deco P9, only way i can get it to work for me turn off seamless wifi, But beats object of buying this system. Really annoyed with TP-Link support as no ideas. Just...