The cams have to be connecting to the router somehow if they are sending clips to the cloud. Likewise if @Ballwhig was able to connect and view the live feeds while on location using the same LAN.
Like others, I have also encountered weird issues with some devices and dual band mesh networks using the same SSID, but Wyze cams never gave me problems on that front.
A question:
Was the new router the only thing that changed this weekend? A whole lot of people with iDevices are having incredibly similar problems after the last app version update.
I believe that @UserCustomerGwen is collecting log numbers from people sending in logfiles