@beernutzbob I have a similar problem since the upgrade...but it is with my Kasa cameras. I am getting ready to switch out this Nighthawk router because I am beyond frustrated.  I just happened upon your post while getting ready to write down all my settings and toss this old Nighthawk away.  Please let me know if you get anywhere with Netgear.  - Peggy

  @RaggedyMom I downgraded the R7800 router firmware to the previous version 1.0.2.86 and the disconnect problem I was having stopped. I also set the router to not automatically upgrade the firmware. 

Reply to this post if you would like more information on how I did this. 

Netgear has not responded to my post on their forum though another user did try to help troubleshoot the problem. While my router has worked well for many years this may be my last one from Netgear.

An alternative to downgrading the firmware, frankly probably a better but trickier to do one, is to install dd-wrt firmware on the router instead of using Netgear's proprietary software.  I've done this on another Netgear router and it's been done by others on the R7800 model. 

  @Solla-topee Thanks. As I noted in my reply to Peggy above, the problem I was having was apparently due to the new Netgear router firmware that I installed. When I downgraded the firmware to the previous version the disconnections stopped.

I do appreciate you reaching out and starting a support ticket, especially since the problem wasn't caused by my Kasa products. I have heard nothing from Netgear support on their forum. 

beernutzbob wrote

  Netgear has not responded to my post on their forum though another user did try to help troubleshoot the problem. While my router has worked well for many years this may be my last one from Netgear.

  @beernutzbob off primary topic, but I ditched Netgear when I moved to my new house, leaving the old equipment as an integral part of the Smart Home setup. I had a Cable Modem and Netgear Mesh Router - both 'top of the line' First off, their warranty is absolutely horrible (effectively 90 days after which you have to pay for premium support to validate the issue is the device at fault) and second, try getting a real person through their support system (without paying for that premium service). That alone was enough to say 'no more'. 

Rant over

  @DEcosse I appreciate your input and believe me I felt the same way.  However after the downgraded Netgear firmware I installed also began to have a disconnection problem I decided to install the latest dd-wrt firmware for my R7800 router this morning.  It has only been about 7 hours but I haven't had a single problem with the new firmware so far and all of my devices reconnected automatically when I used the same SSIDs, passcodes, and security settings.  So I am at least hanging on to my Netgear hardware but their software is ancient history to me now.