hi David, thanks. Yes, it's working like this since I moved to wired connection between the Decos.

if I swap back to wireless connection, that functionality becomes available again.

Here some images.

David-TP wrote

  @ThiagoB 

Hi, welcome to the community.

It is not supposed to happen.

Whether the "slave" Deco is connected to the Main Deco via an Ethernet cable or Wi-Fi, we should be able to set the preferred band/Deco for mobile clients.

 

Are you able to constantly reproduce this issue? Can you share some screenshots here?

It is also suggested to refer to this link to help me submit the Deco APP log:

How to submit Deco APP log

 

Thank you very much and best regards.