Those devices for which I did not set a static IP always grab the same network IP from the Arris, but I manually set the IP for 5 devices to ensure the same IP is always pulled.
The IP I’m referring to for the laptop is a different animal – it’s the IP address which is seen from outside of the network for services such as Google Analytics (so my traffic can be blocked from analytics stats, for example).
I don’t need to access the laptop using an IP, so I don’t honestly care what it is, but I need to access network devices from the laptop, so the network cares what it is. All of my other devices recognize that, despite having what AT&T/Arris refer to as a “public IP” assigned that the laptop is on the same “private network” and those other devices permit me to access them. This WD device is the only one which doesn’t.