I recently flashed from 16b to 17rc3 and now UPnP doesn't work. The internet connection gateway only appears after releasing and renewing Dhcp or disabling and enabling the dhcp client on the router. It only remains for a short time and isn't functional. I've cleared the nvram without any results and I've reflashed and still had the same problem. The only time it works is just after clearing the nvram, once I change any settings in the router it fails. I'm at my wits end, any tips or insights would be greatly appreciated.