This is a player safety foul and absent any guidance not to call this leaping, I would go with a leaping foul.
While I don’t necessarily disagree with you philosophically, leaping is a live-ball foul. The example given is dead-ball action. We can only use rules that apply to dead-ball action, and that would be DOF-Unabated. Once the ball gets legally snapped, then, yes, leaping.
I have seen an example from a recent small college game, and the crew wasn’t certain what the call should have been (and I’m not sure what they did). Perhaps this will get to Shaw, and he will provide direction.
***Update*** In the video example I have seen, the crew went with DOF Unabated, verified with a crew member.