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Does anyone has ever experienced a constant knock sum while driving?? Not warm up.

My 2012 STI is showing constant knock sum of 2,3ish at cylinder 3 and 4 while driving, once it goes up from 0 it wont come back down and stays at the number either driving or come to a red light. Should I be worried about it?? Engine still sounds normal to me, and feedback knock, fine knock are seem normal with -1.4 time to time.

HELP~~~~
 

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Look up other threads with this same problem it. To my understanding pay attention to the knock sum's but don't take it to heart. Mostly monitor the other vitals like DAM and the other knock sensors.
 
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