"Whatever it is, I'm sure we'll find out." He is sad not to see them. But at least he has a feeling that whatever's happened to them, they're not in danger. It might just be a matter of waiting. So he flashes Bumi a light smile. "We just gotta have a faith. And wait for Jinora's curfew!" She didn't seem to know what was going on either, but maybe she found some answers since they parted.