XB8 gateway issue

The XB8 firmware is blocking Xbox

UDP traffic.

My logs show FW.IPv6 forward drops, and the Xbox multiplayer test fails with error 0x000000000000000.

I need IPv6 routing disabled or the IPv4-only gaming profile applied. 

When I search these forums there are a lot of people affected by this and Xfinity seems to not [Edited: "Language"] about fixing it. I have already had a tech come to my home he couldn’t figure it out . Than I was stuck on the phone for 3 hours with advanced tech support and they still could figure it out either . When I check my gateway logs under firewall I can see the gateway blocking the IPV6 port which is what the Xbox gaming console uses to play multiplayer online. I have internet access to the Xbox and can download load games but the multiplayer online is being blocked by gateway. The new firmware xfinity has pushed out to the gate way has caused this issue . I need help