The ironic thing is that even had Sephiroth chosen to ignore Connor, his own trailer is right next to Chloe's. She suggested it when the island made him a child again, and he hasn't found any reason to move. If he had simply returned to his temporary home, their paths would have collided again anyway.

Sephiroth does lose track of Connor for a time, but only after ascertaining his general direction. He can make an educated guess, based on that shared LED indicator, and he catches sight of Connor again as he's approaching Chloe's trailer. That destination means an intervention. He doesn't blend in so well in the dark himself, his hair and his eyes catching any available light, but it's his intention now to make his presence known.

"...I think you'll regret that."