I personally think that any Sonos (regularly) moveable/portable product will unlikely ever use the SonosNet signal, as that is a ‘mesh system’ meaning the connections often occur ‘between’ the Sonos products in your home - The last thing you would need/want is a portable speaker wandering amongst those mesh connections and breaking/creating the SonosNet connection and interrupting or changing them.
 

It’s much better to use SonosNet with products that remain in a ‘fixed’ position. Then any moveable products can use WiFi, on either a separate non-overlapping channel (or different WiFi band) in order to move amongst the SonosNet mesh, without interfering/interruption, whilst still keeping an excellent connection to the nearest local WiFi access point.

Thats a shame if thats the case as my move has a lot of  audio interuptions as it is.

I would have thought sonos net was a stronger more reliable wifi, as well would have better reach. Rather than trying to connect to a single modem it would have a mesh which is broader and be in sync with the other sonos

I'm currently trying to resolve it with customer servive, i have a list of wifi settings to try 

Maybe ensure the device is using the routers 2.4Ghz band rather than the 5Ghz band and select a non-overlapping fixed channel - either 1, 6 or 11 and set the channel-width to 20MHz only, to give you the best chance of a ‘penetrating’ signal with less interference - that should hopefully fix it.