Internet Access Fine for Hours, but Always Ends Up Partially Dying (Spectrum Internet)

What Firmware is currently loaded?
What is the Mfr and model# of the ISP modem the NG router is connected too?

Problem appears for both wired and wireless connections? 

What is the distance between the router and satellite(s)? 30 feet is recommended in between them to begin with depending upon building materials when wirelessly connected.

Any Wifi Neighbors near by? If so, how many?

---

intermittentweb wrote:

Issue:

I can access a website:  ex: engadget.com just fine after my Orbi is reset.  After a few hours, I stop being able to access the website.  (I can still access that website via my phone's cellular network).  If I reset the Orbi or the cable modem, I am able to access the website again.  After a few hours, I stop being able to access the website again.

 

One oddity, I have a Nest camera, and the Nest camera will record fine throughout all of this.  It is unaffected.  My original theory is that I am having some DNS issues, but I just don't see how that can be the case given I have now cycled through all the available free DNS services (cloudflare, google, openDNS, quad9, you name it) with no success.

 

Things I've tried:

• Soft Reset cable modem x 100, Hard reset it to factory x3
• Soft reset orbi x 100, updated it to latest firmware
• Called cable company support and received new cable modem
• Changed DNS to 8.8.8.8, 1.1.1.1, openDNS, auto get DNS from internet provider, etc on Orbi, 
• Disabled IPV6, changed it to DHCP, changed it to autoconfig
• Reset network settings on iPhone (Settings -> General -> Reset Network Settings)
• flushed DNS on PC

Any advice on how to further debug this?  I've downloaded Wireshark but haven't learned how to use it yet.  I want to be able to pinpoint the difference between what's going on underneath the hood for when it is working vs. not working. 

---