There's supposed to be a screen that says "Good job!" and your clear time before booting you back to the title screen. There's six people in total - are you sure you got everyone?
I'm pretty sure, but perhaps I missed something. I gave them their fruits and there was no indicator that they received them or were done. Maybe I did something wrong.
Are you sure you actually delivered the items (using X on keyboard or east face button on controller) and didn't just dump them out (using C on keyboard or west face button on controller)?