PBELS13,
I think it would be worth ensuring that the Orbi 5ghz and 2.4ghz WiFi bands each have different SSID names, as mentioned, as other posts in the main Sonos community here, have mentioned this particular issue previously with the Orbi system.
This YouTube video explains how to easily separate the two Orbi WiFi bands:
https://youtu.be/tEgVG8rR5o8
After band separation, personally speaking, I would choose to go down the route of wiring just one Sonos product to the main Orbi hub, fix and separate apart (by at least 5 channels) the 2.4ghz WiFi and SonosNet channels, so that there is no overlap (use channels 1, 6, 11 to do this) ...and remove any stored WiFi credentials from the Sonos App,that’s if they are stored in “Settings/System/Network/Wireless Setup” (it probably won’t apply, but I have mention this removal of credentials, just in case.) ... that should then provide a stable Sonos system and Orbi WiFi network platform around the home.
For good measure, I would also consider adding all the Sonos IP addresses to the networks DHCP Servers Reservation Table.
Hope your able to easily understand and perhaps follow these network/system suggestions.👍