@roytanck Per Iconic said, devices that won't move around, like cameras and fixed TV's or the devices need to connect to some single band only, like some smart home devices.

@Ixnay Definitely sure.

@Ned01 Thanks for your reply, glad to hear that it was resolved finally. Any further problem, do not hesitate to contact us. Nice day.

@Matti Thanks for your reply, glad to hear that they are working properly. You can refer to the user guide for more information. https://www.tp-link.com/support/download/deco-m5/

@Easin Glad to hear that you got it resolved finally. Congrats.^_^ If need more help in the future, do not hesitate to contact us. Nice day.

@desp Thanks for your reply. Sorry to hear that downgrade does not help. I have to say there is not much we can do now, instead, please contact our tech support with the thread link to check whether...