Ollie made a snap decision to jump to ground. Yes there was contact after the jump but its too late. If he was clever about it he could have won the penalty cleanly just like Kane would have done. Stay on your feet and then ensure the contact. Job done.
Even Ollie's sheepish reaction was telling. He's not a cheat, he tried to be cute and failed and the ref made the decision he did. I don't doubt for a second if that happened against us the ref would give a pen. Anyway Ollie will learn from it.