When you miss an attack as an Arcane Archer fighter, the Shooting Curve function (XGtE, p.28) allows you to use a bonus action to re-launch that attack against another creature within 20 yards of the first .
At the 7th level, you will learn to lead a wandering arrow to a new target. When you make an attack roll with a magic arrow and you miss a shot, you can use a bonus action to re-roll the attack roll against a different target within 20 yards of the target of the target. 39; origin.
Would you need to be able to see the second target when you restart this attack?
I imagine that if you know that the second target is present, it would be as if you are attacking an invisible target and therefore have a disadvantage.
Would it be possible to hit a second target if you did not know that they were there?