Not wishing to be confrontational. But this is a genuine learning curve for us all.This can be the only decision. The moment the goal keeper plays the ball a second time - it is no longer in play, just as a ball going out for a throw-in.
There is no advantage, as play CANNOT continue.
Anybody arguing advantage can be applied and a goal can be given, must also allow advantage when the ball has left the FOP, or play can continue after the whistle has been blown.
This is not an offence under Law 11 or 12, but it under Law 13.
Law 5. 3
Powers and Duties
The Referee
Advantage
allows play to continue when an offence occurs and the non offending team will benefit from the advantage and penalises the offence if the anticipated advantage does not ensue at that time or within a few seconds.
Law 9
Ball out of Play
The ball is out of play when :
Play has been stopped by the referee