Hello Adow, I can assist you with getting this issue corrected. Please send me a private message with your full name, street address, and account number by clicking on my name (ComcastAmir) and then "private message me".
I am having the same issue with my Netgear C6300. Would like to request a a way to get you my details.
I'm having the same issue (no internet access for ipv4, but good for ipv6) since last night (5/8). Thanks for any help!