Question Router losing connection to modem

[Steeler1994]

Let me explain the problem.It's not the speeds that are giving me issues, it's the disconnection issues. I've tried another router and it still give me the same issue. Anytime when the router gets shut off, it loses its IP address. For example, I have a netgear R7800 and the WAN light will light up amber. The other router im testing is a linksys ea8300 where an orange globe appears on the LED. The only way to fix the issue is to factory reset the router. I've tried unplugging the modem and router for 2 minutes and plugging them in one by one, cloning mac address and tried running the setup wizard in both, nothing works. I assumed that since both routers were giving me the same issue, than it has to be the modem, or I'm just missing something. I pay for 250 down and 10 up. I have 10 wireless and 9 wired devices.
Here are my downstream/upstream channels on my modem. https://gyazo.com/f554efcf8b5d933a616d6b2e20b8b5f1https://gyazo.com/4ea70be4badabd3e49f1945acf2f10a1

 

[Grobe]

Both routers are probably configured as dhcp servers, so therefore it get a conflict when both are connected to same network. The solution here is probably to disable that function on the one that is furthest away from modem if they're ment to be connected in series.

 

[Steeler1994]

Both routers are probably configured as dhcp servers, so therefore it get a conflict when both are connected to same network. The solution here is probably to disable that function on the one that is furthest away from modem if they're ment to be connected in series.

They arent connected at the same time. My main router is the R7800 and unplugged it and used the Linksys router to test if it was my main router, but both are having the same issue.