The only legitimate argument I can see is that the snap technically starts with the ball on the ground, but he’s holding it up that duration when the refs have ALREADY established themselves. So if anything the refs are at fault for allowing that to happen in the first place.
But at the same time, it’s already well past everybody is set, including the refs themselves taking their positions, meaning the whistle was blown and the defender is not going to expect an extra movement at the snap. So he jumps based on the movement, after hearing the whistle that the play is to begin.
In the second field goal attempt, the Center places it down before the refs are even set, meaning most likely before the whistle is blown. So they are keying in on a ball that’s already on the ground when the whistle is blown.