Orbi - Wireless Network not available or LED flashing white on Router or Satellite

Hi DarrinM,

I've previously elaborated on the issues I (and many other) users have had with v1.12.0.18 in a number of other topics.  The below is a brief, but by no means exhaustive, list of the issues that I've found in v1.12.0.18.  I will preface this by saying that I have already tried factory reset many times, as well as reverting the firmware and doing manual updates.  The following apply to my Orbi RBR-50 and RBS-50.

1. Satellites updated to the new firmware experience a reduction in backhaul speed of 50% or greater and atypically high pings.
2. Connected satellites are no longer detected as satellites, and show up as network clients with a connection type of "Unknown" in the Attached Devices menu.
3. Attempts to resync misbehaving satellites results in an persistantly pulsing white ring on the satellite and sync failure message from the router after several minutes, which can only be banished by cycling power to the satellite.
4. On the first reboot after the firmware update or factory reset, all satellites connect only to backhaul and fail to activate their wireless access points.  Neither reboots nor using the reset button on the back of the satellite correct the issue, nor does attempting to resync satellites.
5. Ethernet ports on the satellite permit only access to the satellite's configuration page.
6. Decreased connection speed and signal strength from the main RBR-50 router (charts at anywhere from a 22% to 50% decrease in connection speed, per Speedtest.net, modem tests out fine with the full normal speed.  Speeds also test out fine on competitor routers swapped into the system and operating on the same frequencies with identical settings.)

I've also had some issues with intermittent spates of packet-dropping, but I'm not certain if it's related to signal strength fluctiations or something else in the router.

I have, for the record, been forced to revert my system to 1.11.0.20 nine times to date to regain some semblance of network functionality.  I've factory reset my system more than twenty times on both versions either as a prelude to updating or a post-update step (sometimes both).  I've used manual updates and automatic.  The result is invariably the same symptoms outlined in the list above.  I have tried every diagnostic step anyone has recommended to me on these forums, and the only thing that has worked to date has been reverting to 1.11.0.20 and then manually disabling automatic updates in the NVRAM so I don't have to deal with 1.12.0.18's many bugs.