Internet connection disconnecting every few minutes

Hi, On 8/27/25 Xfinity performed maintenance due to an "urgent network performance issue". Ever since then (over a month!) , we have near constant internet disconnections. Strangely this happens most in the mornings, levels out a little in the afternoon and evenings.

Xfinity performed another maintenance on 10/01/25 which did not help.

An example of the internet disconnection today:

I have a tried a few things on my own to troubleshoot, but I am not in the IT world.

I used the Xfinity troubleshooting via the app and via the website while logged in. The app says no issues. However, the website noted there is an issue that a technician needs to address. No details provided.

I have reset the gateway (rented from Xfinity XB6).

All of my computer connections are typically ethernet. I have tried switching to wi-fi and using a hotspot, issue is not resolved.

I work from home and my work laptop is managed by the company, so (to me) that points to an issue with Xfinity - meaning not necessarily my security software or VPN since those are different on work laptop vs home computers.

I called office IT and tried with my work laptop connected to hotspot and at the same time my personal desktop was connected via ethernet directly to the gateway while a third laptop was connected via ethernet into a Netgear switch.

All three disconnected at the same time, regardless of connection.

I also installed a new main switch.

I also tried new ethernet cabling. 

I would appreciate any suggestions or help - please let me know what info you may need.