Iv'e been having the same issue with the new GB service and the XB6. I'm a streamer and priarily use Mixer or Twitch. When i try to stream Mixer with FTL, i cannot use more then a 1700 bitrate or the stream dies and the XB6 reboots.When just gaming on XBL speeds are garbage. I was on the Blast 400 with the XB3 and not a single issue. I have had techs out 5 times to witness the issue. Was told "don't use mixer to stream". Good answer "tech".. I'm a Systems Administrator by trade so im tech savvy. So i've called support more then 40 times, they are no help. I have read that the Nighthawk x4s solves the issue but there's 400 bucks. From all of my research, its an issue with the Intel's PUMA 6,7 chipset on those crappy gateways. There is no fix for it at the time but a Teir 2 rep told me "they are working on a fix by end of spring 2018".. unreal .