Giving up on IPv6 on AT&T network

Last year if you went to AT&T's highest speed tier for Fiber to the corner and copper to the house you received a new residential gateway, Motorola NVG589 which tunneled IPv6 though AT&T uverse network out to the wild. I would say the service at first was not very reliable. Packets were lost, things would stop working and then magically work. Then sometime in May/June a new firmware was pushed to the NVG589 and everything started to work as expected.

Well this Saturday I start to notice...

Giving up on IPv6 on AT&T network