Your back angle should be the same going into the hole as it is coming out of the hole. It looks (to me, just my opinion) like your knees are jammed a little too far forward and your torso is a little to vertical. Then coming out of the hole, your body tries to return to a position of power. But doing so means your getting extra movement in a bad way. And you are being thrown out of position with the change in trunk angle. So work on setting your correct back angle a little earlier and focus on it not changing at all going in and out of the bottom.