The other day I put my modem on a digital timer. It turns off at 3:15, and on at 3:16. I'm hoping that this middle of the night, daily reboot will prevent the occasional need to manually reboot. I've noticed that my IP6v IP address changes each day as expected, but the IP4v address doesn't. Does anyone know why?
I assume that your device is the first one connecting to it after the reboot. If you turn the wifi off/disconnect the RJ45 cable and let another device connect first (through same medium... either wifi or direct cable), you will probably see your IPv4 address change.