Internet glitches several times a day since late July/August 2026

Hello,

Like the poster here:
https://forums.xfinity.com/conversations/your-home-network/ongoing-internet-issues-since-august-6-service-work/6a75aae9f5a829dbc0062004

I have been experiencing several moments of downtime on my Xfinity service since mid/late July and August 2026; I have replaced my modem, which is self-owned, I changed out my router, also self-owned, and the downtime seems to be related to DNS failures, because most are too short to be related to my modem.  I have tried both the Hitron CODA as well as the CODA 56 units and have experienced similar degraded performance.  If the CODA units are both faulty, I will surrender the brand, but as my Coda 56 was working perfectly for almost a year before 8/26, I hardly think its the actual modem.  I have already had a tech to my home and they say my signal levels are good, which means the problem is elsewhere in xfinity's infrastructure.  I know my internal ethernet wiring is good because I have no issues with local file transfers or sharing amongst my computers.

The common factor that shows up when the disconnections become common is that my UPLOAD speed slows to 1-2 megabits per second, whereas I should be hitting 150.  My 400 megabit download speed remains the same.


Please help!