OrbiOS 2.1.4.10 kills Internet access if you use Ethernet back haul

I've come to the conclusion that ethernet backhaul in 2.1.4.1 doesn't work even though it worked fine for me in the previous release (2.1.3.6?).  I've come to that conclusion based upon the following:

-6 days ago was autoupdated to 2.1.4.1 the problems started immediately.  My setup was 2 wired sats and 1 wireless sat.

-performed full-reset as has been advocated on the forum.  still nothing but problems.

-on day 5 decided to convert one of the wired sats back to wireless and left the other wired sat unplugged. (meaning I now have 2 wireless sats).  I had 3 days of zero problems with this config.

-to test if the wired sat was the problem I turned it back on.  It connected but it immediately knocked off one of my 2 wireless sats.  No combination of router rebooting or sat rebooting could get the knocked off wireless sat to come back.

-conclusion: given that I had 3 days with zero problems without ethernet backhaul and then no more than 5 minutes after plugging in the 3rd sat with ethernet nothing but problems my conclusion is that ethernet backhaul is broken.

To advise netgear of my config, I've been on the forum for months and made sure that when I did the full reset 6 days ago that I had everything turned off including daisy chain.  My wifi devices are very simple, a bunch of ipads and iphones and a couple of laptops.  I don't have sonos, I don't have apple home, I don't have cameras, I don't use VPN.  Other than a 2.5 ghz wifi sprinkler it is about as simple as you can get.  All told I have less than 10 wifi clients.  It can't be a orbi hardware issue because as soon as I unplugged the ethernet backhaul satellite and rebooted the wireless satellite and router one last time, the wifi satellite that refused to connect when there was ethernet sat present came back online in less than 3 minutes once that ether sat was gone.

-Right now I'm limping along with my 2 sats on wifi, really would like to be able to plug that 3rd sat back in but it is too far away from the orbi router is use wifi backhaul...this sat needs to be ethernet...ethernet availablilty was the whole reason I bought the orbi back in december.

My ISP is Uverse Gigapower.  BGW210 is the gateway (wifi disabled).  I have all the TV Set-top boxes isolated on a completely seperate netgear switch to ensure Uverse's multicast IGMP flooding is avoided.  The orbi router is in AP mode with static IP.  Every orbi option is turned off.  I've set the wifi channel to one.  I'm getting great performance out of the router and 2 wifi sats.  Getting 400 MBPS up and down on all three.

Netgear: I'm hoping that you have enough evidence from the field now that you need to look closer at this latest firmware and provide an update to the forum community.