New Online Update 4.6.3.16 (RBR850/RBS850)

After updating my RBK852 system to version V4.6.3.16_2.0.51 satellite wouldn't connect to router. Only after erasing satellite (2 times) and router I was able to sync both systems again.

I now face another problem: when the router is in "router mode" i can see 1 attached sattelite and N attached devices in the orbi web home page (right most tile) but as soon as I put the orbi in "AP mode" the attached satellite disapears from the home page (it is also invisible in firmware update page) but it is still visibile in the detailed attached devices page (the one where backhaul status quality is displayed).

I know that both pages do ajax requests and that requests to get_attached_devices result in:

{
    "satellites": [
        {
            "mac": "XXXXXX",
            "type": "Router",
            "model": "RBS850",
            "name": "Orbi Satellite-1",
            "ip": "192.168.3.45",
            "connectionType": "Wired",
            "connectionImg": "img/wiredConnection.png",
            "ConnectedOrbi": "Orbi Router",
            "backhaulStatusStyle": "TextGreen",
            "backhaulStatus": "Good",
            "category": "0",
            "status": 255,
            "sat_type": 1,
            "led_status": 0,
            "led_brightness": 0,
            "led_sync": 0,
            "voice_reg": "",
            "ConnectedOrbiMAC": "XXXXX"
        }
    ],

 whereas requests done to basicstatus.cgi result in:

{
    "internet": 0,
    "internet_head": "STATUS",
    "internet_text": "GOOD",
    "satellites_num": 0,
    "devices_num": 27
}

Is this a webinterface glitch or does this cause problems with device not routing automatically between nodes?

I've tried changing wifi parameters in the router and after a few seconds those were synced to the satellite 

Yes, I do have an 8 series system. When I said "Did the whole troubleshooting thing - bouncing all routers and APs - even going back to bounce the ONC." it included powering off everything. I guess people are not familiar with the term "bounce" - in the server support world, it's a reboot. To be more clear, my troubleshooting steps were:

• Run speed tests from multiple devices. All were in the 20 Mb range in a network that normally provides 300-400Mb to each wireless device
• Check the link speeds as reported
  • Orbi reproted 54 Mb when normally in the 500Mb to 1000+Mb range
  • Mac OSX reproted 54 Mb when normally in the 500Mb to 1000+Mb range.
  • stopping and restarting wifi on devices with slow links to Orbi.
  • Check speed at cable modem - speeds in range - 800Mb+
• Power down both cable modem and Orbi system - RBR and RBS.
• Power up cable modem - wait for positive connectivity
• Power up RBR - wait for positive connectivity
• Power up RBS - wait for positive connectivity,
• Recheck link speeds. They all remained the same. 
• Checked link speed at cable modem. Speeds in normal range - 800Mb+
• Cycle power to FIOS ONC - the box where fiber comes in, ethernet comes out.
• Recheck everything - nothign is normal.
• Throughout this process, it was difficult accessing the Orbi home page and the Orbi app failed to respond normally. Often - the web page would not populate.
• Last ditch effort - reset to factory default by pressing the button on the rear of the RBR. That was the fix in my case.