This is a pet peeve of mine, when a player is fouled and grabs the ball before the whistle is blown.I think this is the main part of it. Player was punished for picking the ball up before the whistle. We see this happen all the time on iffy calls when it's not clear if the ref already blew or not, you know the one. The player gets fouled and he or another player quickly grabs the ball. If it doesn't get called, the play doesn't stop. But usually the play either gets stopped there and sometimes that influence's the ref's decision.
IMO, should be a yellow when that happens. But perhaps that's why I'm not a ref.