Who Me Too'd this solution

Looks like this is working for users by enabled then disabling Traffic Meter:

https://community.netgear.com/t5/Cable-Modems-Gateways/CAX30-Xfinity-issue-FIXED/td-p/2296280/jump-t...

Seems to get the CAX30 back up and running. 

If the Traffic Meter method doesn't work, please try a factory reset on the CAX30 modem and setup from scratch using a wired PC and web browser. Don't enable any additional features like Armor, SPC or Traffic Meter after the setup completes. 

NG is aware of this and is currently under review. 

For those of you who can access the debug page, please set 192.168.1.1/debug.htm to start capturing logs please. Let the logging run for 5 minutes then save them.  Post them to a online cloud service like DropBox or OneDrive and PM me the link. NG would like to review these logs.