@Joseph-TP Thank you. After the upgrade, the problem is solved; I can now connect to the 5 GHz network with my other devices even when the 2.4 GHz network is disabled. The only difference I noticed...

@Joseph-TP I also have same issue with my BE400 V1.20. Could you please provide me the new firmware you sent to @ashish7adlakha ? I hope it is not 1.2.4 cause it is also broken. Edit : I've just...