AC1750 / R6350 Issues after firmware update

Hey guys,

I'm having a time with my router. It's been mostly fine for a while now. Every once in a while, it loses an internet connection and a simple reboot helps. Then last night happened. I went into the Nighthawk app and saw a firmware update, so I installed the update. Immediately I saw problems. It was slow, then I just completely lost internet 15 minutes after the installation and reboot. Had to unplug everything, then plug back in and turn on. Ok. Then the same thing happened 3 more times today. All before 4pm EST. I have Spectrum and use their modem. It's just weird that this all happened as soon as the firmware updated. I even did a complete factory reset today. Still lost a connection. It doesn't come right back. I have to unplug EVERYTHING. Router, modem - everything. Speeds are still slow, but they have been since more people have been home with COVID. They used to be 100+ Gbps, now down to half that. 

I went into all the basic and advanced settings through my computer browser and checked stuff, found some DoS Attacks, but I read those are false positives most of the time on Netgear. They all happened since the last breakdown, so I don't know if they're doing something. It's all strange. 

If anyone has had something similar happen, or can offer some feedback, that would be awesome and much appreciated.

I hope you all are doing well, and are safe and happy. 

Thank you!