I'm having the same issue. Whenever this occurs, CPU0 and CPU1 are maxed out at 100% utilization. Eventually, CPU util starts to drop and internet/network traffic starts to flow again. This has been happening intermittently for about a week. Up until this time, I've had no issues with the router, I've made no changes (configuration or otherwise).
I've got this firmware update waiting but every time I hit "update" it doesn't actually update. It reboots and acts like it is, but we wind up back here. I've hard rebooted the router multiple times.
Update Firmware
Current Version: 1.1.0.16
New Version: 1.1.0.16_2.1.25
log-1740695976811.txt