ORBI RBR/RBS Broadcast Storm Problem / Ethernet Backhaul creates network loop & kills networks

Thanks for trying, but I wasn't looking for more community answers, I am satisifed with my diagnosis.  My intention is to provide some more information to those who might be having this problem, as I hadn't found any other real solutions through my search, and I had also found other long running threads that did not end with a resolution.

The issue is that Orbi creates it's own network loop between the router and satellite.  This is independent of any other connected devices or topology.  This is independent of whether you connect to the rest of the LAN via the RBR WAN or LAN port, and regardless of directly connecting orbi's together with no other devices connected to Orbi's ethernet ports.

It's probably not likely that someone would notice/encounter this problem unless running in AP mode with Ethernet backhaul.  Also as this only occurs on device boot, many may not even notice it.  Before I obtained my current switch I had suspected something else in my network.  But it's obvious when looking at the stats for huge numbers of broadcast packets all flowing into the switch interface connected to the Orbi router.

<all other devices> -> [lan switch] <- [Orbi RBR] <- [Orbi RBS]

Simply having an ethernet backhaul connected causes Orbi to create the network loop on boot.  Yes Orbi later prioritises Ethernet backhaul traffic, and the broadcasts stop, but the network loop still exists on boot where both the Wifi Backhaul and the Ethernet backhaul are active for a time until it completes initialisation.  It's possible to see evidence of this in the "Statistics" on the device when viewing WLAN backhaul packet numbers immediately after boot, but it was much more clear when I connected it to a decent switch to see the numbers.

Thanks again,

Damien.