We recently "upgraded" our Comcast gateway to a new XB7 model (from XB6) which, indeed does offer faster Wifi speeds. We noticed that our Model 3 (but not older Model S) was losing 10 to 15 miles while sitting in the garage overnight. Tesla investigated and found that the car was being pinged by the MAC address of the 5 mHz wireless interface many times each hour and was being woken each time. We disconnected the car from our home network and the problem disappeared. These XB7 gateways are common in the industry but I have not seen any other reports of this. It is possible to reduce the pinging frequency by eliminating our home mesh network but this is not a viable option for us. Anyone else with a Comcast XB7?