I am also losing internet access from time to time when connecting an ethernet cable to my laptop ( from a lan port on the second router ).
Should I attach a system log after this happens?
Tue Apr 18 22:34:40 2023 daemon.notice netifd: Interface 'wg0' is now down
Tue Apr 18 22:34:40 2023 daemon.notice netifd: Interface 'wg0' is setting up now
Tue Apr 18 22:34:41 2023 daemon.notice netifd: Interface 'wg0' is now up
Tue Apr 18 22:34:41 2023 daemon.notice netifd: Network device 'wg0' link is up
Tue Apr 18 22:34:41 2023 user.info : luci: accepted login on / for root from 192.168.0.130
Tue Apr 18 22:34:41 2023 user.notice firewall: Reloading firewall due to ifup of wg0 (wg0)
Tue Apr 18 22:35:03 2023 cron.err crond[2442]: USER root pid 2792 cmd /usr/share/wginstaller/wg.sh cleanup_wginterfaces
Tue Apr 18 22:35:04 2023 daemon.notice netifd: Network device 'wg0' link is down
it seems that I'm not the only one having this problem:
reddit
also, the internet starts working again after reconnecting the cable to my laptop
Tue Apr 18 22:37:58 2023 user.notice firewall: Reloading firewall due to ifup of wg0 (wg0)
Tue Apr 18 22:40:00 2023 cron.err crond[2442]: USER root pid 3109 cmd /usr/share/wginstaller/wg.sh cleanup_wginterfaces
Tue Apr 18 22:40:00 2023 daemon.notice netifd: Network device 'wg0' link is down
Tue Apr 18 22:44:25 2023 kern.info kernel: [ 618.627216] mt7530 mdio-bus:1f lan2: Link is Down
Tue Apr 18 22:44:25 2023 kern.info kernel: [ 618.632370] br-lan: port 3(lan2) entered disabled state
Tue Apr 18 22:44:25 2023 daemon.notice netifd: Network device 'lan2' link is down
Tue Apr 18 22:44:35 2023 kern.info kernel: [ 628.258200] mt7530 mdio-bus:1f lan2: Link is Up - 1Gbps/Full - flow control rx/tx
Tue Apr 18 22:44:35 2023 kern.info kernel: [ 628.265722] br-lan: port 3(lan2) entered blocking state
Tue Apr 18 22:44:35 2023 kern.info kernel: [ 628.270990] br-lan: port 3(lan2) entered forwarding state
Tue Apr 18 22:44:35 2023 daemon.notice netifd: Network device 'lan2' link is up