Hi @Vincent-TP, i'm already tested using stand alone (auto channel) still the issue is the same. my device (Lenovo Win11, Xiaomi Redmi Note 12 ) that access stand alone SSID (5G), got channel < 149 ~...

OC 200 controller hardware v1.0 with AP eap 653(US) v1.0 v1.0.14 5G auto cannot reach 149~161 channel so cannot utilize the channel to get the good frequency, and some client device cannot reach DFS...