@Nifflas Irrelevant, with the one clarification (not enough to say "It's complicated") that the three chests are always understood to come as a set and, as the player opens one, the other unopened chests can no longer be that chest.
I mean, if you say it matters that the presentation doesn't match reality, then aren't you saying that the chests shouldn't be RNG at all? So the item you get couldn't be randomly determined by which chest you pick, or when you pick a chest?