Arris tm3402 constant connection loss on WAN port (no DHCP lease)

I'm having an issue where my Arris TM3402 modem is constantly dropping the internet connection to my router.  It happens mostly at night between 12am-6am, where I wake up and internet is gone, but also has been happening constantly during the day while I'm working

When it happens:

-I have to reboot the modem to regain access (sometimes multiple times and sometimes it takes a long time before it comes back after repetitive reboots).

-All of the lights on the front of the modem are lit, indicating the cable connection is established, the phone line works just fine, but the WAN port on the back has zero activity or lights, and my router has no DHCP lease or WAN IP address

I've been reading forums and understand this is voltage bug issue on the intel chipset - see link at https://forums.cox.com/forum_home/internet_forum/f/internet-forum/29453/arries-tm3402 where a cox moderator confirmed this.

Below is the info on my modem (as I understand it the HW_REV 7 is the problem):

I have swapped it once already with the local Cox store due to the same issue, only for it to return.  This was prior to my knowledge of the HW7 issue. I called the local cox store here and they stated there is no way to tell what HW REV they have in store, just that they'll swap it again.  

I would like to have a HW REV 8 shipped to me as a replacement if possible.

Assistance is appreciate as this issue is very persistent and causing constant disruptions in my daily work

Thanks!