Orbi RBR50 router randomly disconnects/blocks internet for the whole network.

The Orbi is connected to a fiber -> ethernet/coax (for TV) splitter.

No modem.

This splitter is branded "Canal Digital", but have no number.

ISP is Telenor.

Question is what does any of your questions have to do with my issue, as I've confirmed that the issue also occurs when directly connected to the switch in the Orbi router (no wifi used at all). But to humor you:

We count in Square meters. 3 floors and totally 162sqm, google tells me this is 1722,23 sqf.

All neighbours have wifi, however, I see only like max 4 within my range.

I'm reluctant to do a factory reset, as it's alot of work to get everything back up and running.

Like if I do a factory reset and upload my config again, it beats the reasoning for doing a factory reset.

I can tell you however that after the last factory reset I did when I had my CS case, it took about 2 days until I saw the issue again.
Usually, I see it daily.

I can tell you that I did disable armor yesterday (did not fix it).

And I did disable Circle like two hours ago,
I can update tomorrow with new status if that fixed it.

Also notice, I try to only do one thing at the time to help pinpoint what fixes the issue.

I tell you though, the reasoning for disabling armor before circle was that the router have internet access (when using ping from the router shell), while the rest of the network does not.
Or to simplify:

Anything inside that the router serves (wifi or ethernet) can ping the router but not the ISP GW. at the same time, the router can ping the ISP GW.
Also at the same time this is happening, I'm able to ping the ISP GW directly from any equipmet I connect to my Asus router that I also connect to the fibre->ethernet splitter.

Last piece of information: The fastest way to recover from the "blocking" is to open the router ui, click the internet link in the basic menu, then click "Test".

It seems this is doing a dhcp release/refresh, as this always give me a new IP.