[Skie]

I think it's one of the provisioning oddities with modem mode vs router mode, as the VM network sees a different MAC address you need to reboot (or possibly just release the lease) to make everything work again.

Probably a legacy of the old old old system of only allowing one MAC address to connect to their network, so you had to clone the registered address if you changed router. This was back before they started pushing combined modem/routers.