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Hi all, I am going to make this succinct.

I noticed my Archer C1200 is having CPU loading issues. The symptoms are sometimes a little different but eventually all devices are disconnected from a router and cannot reconnect until I restart the router. On the status page, the CPU usage was sometimes near 100%.

I have evidence that it's not interference issues, I tried a factory reset, and the firmware is already the latest.

The router worked fine for 6 months and the issues were not immediately following any network change or new device.

Why would my router CPU usage be so high? How can I diagnose it?

Thanks in advance!