RBK852 - AX6000 with Amor enabled and Sagemcom Fast 3890V3 cable modem a Bad combination

After a very long process with my internet provider, I have finally solved my internet
connection issues.

Here is a brief story of the problem and how I "solved" it.

Background:
After replacing my very stable but not so fast Google Nest Mesh system with an Orbi RBK852 Mesh system, my internet connection suddenly became incredibly unstable. I contacted my internet provider, which is Denmark's largest, as I had not done anything else on my network other than replace my Google Mesh system with an Orbi system.

My internet provider was, as always, very helpful and took my issue very seriously. They began monitoring my cable modem and sent a technician to my address to ensure that I did not have noise on my coax cable. YouSee my internet provider, could not detect any faults on the coax cable, signal values, or their cable modem. Therefore, their clear conclusion was that the problem must be something on my network that caused their modem to go down.

I was quite baffled by this conclusion as the only thing I had done was replace my router. I was under the clear impression that I had upgraded my system, but that turned out not to be the case.

As my internet provider seemed extremely confident in their assessment, there was not much else to do but begin troubleshooting my own installation. Since I was unable to find faults on my switches, patch cables, cross-connects, or other equipment, there was nothing else to do but start replacing my cables, switches etc.

After spending around $1,400 on the the above, plus $800 on the Orbi system, I unfortunately discovered that this did not solve my problem.

Solution: 

The only thing I had yet to troubleshoot was my new router, which in hindsight I should have started with. It turned out that my problem was the Amor product, which I had of course activated during the setup of the Orbi system. As soon as I deactivated the Amor security solution, my internet connection was 100% stable again.

I have now been running for over 160 hours without any outages. If I activate Amor, I can typically run for a few minutes, and sometimes a few hours.

Now I am almost $2,200 poorer, but much wiser. So to all those who need a router with built-in security software and who use a Sagemcom Fast 3890V3 modem, I strongly recommend finding another solution. 

The only bright spot in this unfortunate experience is that I fortunately didn't subscribe to the Amor product. That would have been the final nail in the coffin.