Orbi AX6000 + 1 Satellite Inability to Change 5G Channel

Orbi AX6000, RBK582 +1 Satellite, Firmware V3.2.18.1_1.4.14. 

Firstly, I love my Orbi Mesh system.  However, I have Arlo base stations.  It seems that since I have replaced my router there is intermittent interference respective to frequency with the Arlo Base Stations which affects the quality of their signals and recordings.  The Arlo Base Stations are fixed frequency, their frequency channel can't be changed. I have discovered that there is no problem in changing the Orbi 2.4g channel but when I try to change to different channels for 5g on Orbi Router, the channel remains at 40, even after reboot, etc.

Has anyone else encountered this problem and is there a solution?

Thanks