Orbi Pro - signals flatlining

Still debugging Orib Pro Wi-Fi disconnects.  The organization has a router, satellite and two ceiling mounts. Most of the client device are not moving around. The symptoms are random Wi-Fi connected devices disconnect, and most reconnect.  The Raspberry Pi based commercial devices don't re-connect. The phone, Mac and Windows devices do reconnect. There is a few second pause between reconnections.  The wired ethernet devices work fine.  The 30Mb streaming upload works fine.  

I tried a variety of debugging approaches: read forums, updated firmware, reduced power to ceiling mounts, split 2.4 and 5ghz channels, purchased a new cable modem, had Suddenlink inspect and verify the lines and signals are fine.   I decided that either one of the devices is bad, or there is some noise affecting the Wi-Fi signals. 

Today I unplugged the ceiling mount devices. There are only the router and satellite running. I turned on the Android Wi-Fi analyzer app and I can see three signals (one for 2.4 and two for 5ghz) for each of the three networks (staff, kids and admin).   You can see the signal noise in the app. 

Then I had a "duh" moment. I never saw the filter option on the app. I filtered to see only the staff signals.

That is when I saw the flatlining signal. From my previous experience, that indicates a bad device.  After some seconds, the signal comes back on.   BTW, three of those broadcast signals are coming from the router and the other two are from the satellite.  Why doesn't the satellite have three also TBD?   Next, I disconnected the satellite and now signals flatlining and no device disconnects. I plugged back in the satellite and same signal problem.   I did not try the same thing with the other ceiling mount devices yet. 

I talked the person who installed the system and he suggested that might be normal for an Orbi mesh as it does its magic making sure the SSIDs are visible and powerful.  My opinion was that is not normal and indicates a hardware/firmare fault (as it did on two other routers I had). 

At this point I think I found the culprit. I am going to replace the satellite with a switch as we don't need the Wi-Fi broadcasts in that part of the building.  My next step is to perform the same test on the ceiling devices to see if they are showing intermittent flatlining. We have to re-power the raspberry pi KidCheck devices before using as they can't recover from the drops. 

Suggestions on a better way forward?