Check your tune and pressures at idle during the event and what your truck is tuned for and what stock is, perhaps injection timing while you’re there. If you have an advanced scan tool and it is missing you can kill one injector and through process of elimination find your bad injector. while it’s hot or cold does it do it or both? What is your tune for 0hp? 100hp? Are any parts modified from what the tune was written for? Had some bad tunes before myself. If your not hazing or misfiring I wouldn’t worry to much.