Is the situation the same with Airtime Fairness? I have to enable it before I enable the SmartConnect and it will stay enabled?

Hi all, I bought an Archer A9 AC1900 hardware version 6 and I have the following question When I have both 2.4 and 5 GHz netwroks separately enabled, I can enable the MU-MIMO on the 5GHz, but when I...