Arris NVG599 drops internet several times a day, every day
I am using Arris NVG599 router which ATT provided. I've already replaced this router once through ATT because of this same issue.
Every day my internet randomly drops. The Broadband lights blink red a few times, I'll lose the internet connection, and if I am browsing the web my browser window opens up a page to "http://www.msftconnecttest.com/redirect" and I'll get an error message in my browser that my connection is not private. On my work laptop running Outlook I get an error that the certificate isn't validated correctly and my VPN gives a message about a "Captive Portal" being detected.
The internet drops out for all devices. Even my phone won't load anything if I'm connected to Wifi when this happens and my desktop computer is plugged into the Arris router with an ethernet cable directly. If I am quick enough to disconnect the mobile phone from Wifi and open the Smart Home Manager app, it too confirms no connection.
This happens several times a day where it is just annoying enough to affect my day negatively, especially since it is guaranteed that it will drop during an important business conference call now that we are in lockdown and I am working from home. But a majority of the time it does work. This just isn't normal to have a disconnection EVERY day, not to mention several times a day. After about 2 minutes the internet will reconnect and may stay on for several hours... or only 10 minutes and do it again. I've contacted the help desk at ATT and had a service technician come out but no one has fixed this issue. This is going on over a year this problem has existed.
My internet package is the 50 Meg down Uverse DSL since fiber is not available in my area yet.