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Does it only happen on sudden(ish) throttle position change?
Have you logged at all? Even if it's not throwing a CEL, good datalogs might indicate the root cause. Especially if you can log the issue happening.
Odd as it sounds, verify the battery connections are good - clean and tight.
My first real guess is MAF sensor, possibly the idle control in the throttle body in need of a cleaning. I've had issues like this with a different car using MAP and of course that's barely similar, so these are wild guesses to get things rolling.
I had issues like this occasionally (especially from a dead stop) with my OFT tune on the '14... so it can be 100% tune related. I doubt that's your issue but note it just in case it makes someone think of something.
Hope it's an easy fix.
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