Looked back into the log history. I found this hourly pattern in the syslogs: 2024-01-30 09:25:01 led-controller[1386]: <6> 288051 Start to run WAN1_OFF 2024-01-30 09:25:01 led-controller[1386]: <6>...

Hi @ZhenC. I've been having the exact same problem with my Archer C4000. Like you I have not found a permanent solution. To temporary alleviate the issue, I unplug and replug the network cable...