Now we are going to get into physics......
Gripping and picking up the ball laying on the plate demonstrated control of the ball. In order to pick up the ball, the player had to have a firm grip on it and control of it. If the ball was picked up cleanly, and I don't see anything to indicate it wasn't, the grip and control was established while the ball was on the plate.
The control of the ball and it's contact with the plate may have only lasted for a few milliseconds, but it was there.