I had similar situation happened before, and factory reset did not help for my case.
you can try simple factory reset first to see if it helps.
if not,
I will perform the power cycle + clear nvram via wps button
power off the router, hold wps button while power on
wait till the power led start blinking/flashing, then release the wps button
now wait for the router to proper booting on its own.
and you can reconfigure everything from there, dont load the old setup.
If i remember correctly, merlin did mention compatibility issue for WTFast n his code, so it should not be available.Ok so after checking different settings I have narrowed it down to WTFast under Game boost to be the problem with High cpu 384.8 r , everytime I would sign in and apply settings it would spike and stay high. Once I delete the rule list it would drop off . Not sure why this is causing 100% cpu
Went back to Beta 2 works fine with WTFast and no high cpu.
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