Ethernet 1 losing ip address from isp router

Hi all, I’m 4.7.4 beta on Flint 2 and have encountered an issue. My Flint 2 is connected to my ISP router via ethernet. Sometimes the flint 2 loses ip address on the ethernet connection (ethernet 1) and fails to get an ip address until I reboot it. In order to ensure no internet interruption I have connected to the same ISP router via wifi as repeater so that when ethernet loses ip address the connection fails over to the repeater. Issue happens about twice a week. The router isnot set to reboot automatically. The system logs are linked below.

TLDR: So the issue is Flint 2 losing Internet connection by randomly losing ip address from ISP router and can only be fixed by a reboot of the Flint 2.
Lan Failure logread.tar (256 KB)

When it happens, have you tried pulling the WAN Ethernet cable and reconnecting it to see if that works? If it does, then perhaps there’s a similar issue using the default 2.5Ghz WAN port with your ISP’s router like I had with the Brume 2’s 2.5Ghz WAN port.

The problem I had with the 2.5Ghz WAN port on the Brume 2 was that it wouldn’t get an IP after a reboot which is the opposite of your situation. So I ended up swapping the 2.5Ghz WAN port around with the 1Ghz LAN port which fixed it.

I tried replugging the cable but it didn't fix. Ethernet 2 is plugged to a 4g router that is used for backup when the ISP router experiences downtime.