Bar drifts forward during the pause
Lats not engaged; moment arm increases during the hold.
Overactive muscles
Pec majorAnterior deltoid
Corrective work
Foam RollPectorals↗Foam RollLats↗StretchDoorway pec stretch↗Lats not engaged; moment arm increases during the hold.
Squatting the bar; leg drive angle changes unfavorably.