As you stated, this seems to be a major new issue likely cropped up in some recent firmware updates for the routers (Comcast is pretty mum on this but it's the obvious culprit). I am right now browsing the internet with my phone which is connected to my Wi-Fi and the xFi and Admin console screens both list that device as not connected. My other phone is by my side and has the WiFi turned off for the past half hour and it still shows up as connected in xFi and VERY oddly doesn't show up AT ALL in the Admin Console screens (neither connected nor disconnected). It's amazing a bug this huge got out of Philly wihout being noticed, they should at least do a rollback on the routers until they get this fixed as this is a big issue. Comcast seemed like they were on a roll for a while a few years ago, but lately they are really dropping the ball on a number of fronts.
I am having the same issue. It shows that my phone is not connected when it clearly is. It makes me wonder if things that are “not connected “ really are.
My XB6 gateway appeared in my xFi app yesterday; it shows a not connected.
I have a total of 23 devices not connected, including all my X1 STB's and my family's phones that aren't on the premises.
Each day, my number of connected devices varies from 13 to 17+.
I have no idea why devices show as not connected.
If you are still experiencing this issue, we would like to look into it further.
Can you please send me a screenshot of xFi showing the device in the wrong status, as well as a screenshot from the device at that same time showing that it is connected to your home network?
In addition to those, I would need to know the date and time that these screenshots were captured (timestamp I can usually get from the screenshots, but please include it just in case).