After hours of IT buddy trying to set up discovered the IP sync issue, TWC no real help as their friendly service techs cannot reset IP and if you don't have a computer with a land connection you are stuck

This modem installed just fine with Comcast, however Comcast refused to issue a static IP using it, regardless of the router it is attached to

I renewed my router's WAN IP just in case but received the same dynamic public IP from the cable modem (was not needed step)

It finally started losing the IP

I need the performance of a hard wire network, and have many devices to deal with and had to configure the router to consume a static IP from this modem.