Hi ,
Welcome to the Community! I'm sorry to hear of the issues that you've been having with Wi-Fi setup and would be happy to help.
While there are many benefits to having a mesh network in your setup (increased range, stability, etc), this may not work as intended depending on the way that this is being routed. Normally, wired and wireless connections can be grouped, but if your mesh network(s) are handling connections in a slightly different way than the original router, then there are a lot of variables that can affect the connection.
We would normally recommend that, where possible, you have all the speakers connected to the same access point (ideally the original router), as this would be the best option for the connected products.
I understand that this would defeat the point of using the mesh to extend the coverage, so there are a few things that I would recommend here.
Firstly, I would recommend that, if this is not already the case, that you run all the mesh networks using the same details as the original router (same channel, name, bands, etc.), and then power cycle these to ensure that these update.
Following this, I would also advise that you disable any settings on the router that may block or prevent connection between items - these are commonly labelled as "Stealth Mode" or something similar.
If you have given both of the above a try, please return to me to let me know what is happening! Alternatively you could reach out to Bose Support directly to discuss this by selecting your country/region, then navigating to "Contact Us" at the bottom of the page.
If anyone else has used mesh networks (or particularly this mesh network) in their setup successfully, please chime in here with any information that could be helpful!
Liam W - Community Support