Knock at Partial Throttle?

[afree]

I have not noticed this before, but at partial throttle, knock is dropping timing a few degrees:
https://datazap.me/u/afree/log-1766248505?log=0&data=4-12-21-31-44

Here is just a 4th gear pull, no knock:
https://datazap.me/u/afree/log-1766248830?log=0&data=4-12-29-44

Any thoughts? Ecutek OTS stage 2 tune on 93oct.

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