Yes, agreed; I came in too quickly here without proper consultation of the relevant passage in law on goalkeeper's being exempt from misconduct handling offences. I stand humbly corrected (incidentally, it has never actually happened to me in a match), and my reference to Liverpool vs. Bordeaux (not Marseille, as I wrote first time) overlooked the critical fact that Mignolet conceded the indirect free kick, but not the yellow card.
He should have been cautioned IMO, not for the offense of holding the ball too long, but for refusing to put it down after the whistle. That's delaying the restart.