I recently moved and had new AT&T installed with BGW-320-500 router / modem. Added my AX-86U and initially resulted in an addr of 192.168.50.1 like it should. Was able to log on, etc. Last week 192.168.50 disappeared and the AT&T router has it identified as 192.168.1.87 or something. Now I can't log onto the AX-86U. Both routers are active and have their own net ID. WiFi and Ethernet connected devices still show that they are connected to the router name for which they were configured. Basically most household IoT devices and gaming devices are connected the the AX-86U. BGW-320 handles switched ethernet. I should state that I am not a net expert. Just have enough knowledge to cause these kinds of problems. I did note that a recent firmware update could be causing issues. I do believe I have the Asus configured to auto update.