[torgoguys]

Because they appear to have a curious way of doing their saves. From the article:

>The way Slay the Spire allows you to save and resume runs is by storing the total number of times each RNG has been called, and then calling each RNG that many times (throwing away the result) whenever a save file is loaded.

Depending on what the game is like (I know nothing about it), that could make sense, even if it is inelegant.

[hannasanarion]

That's just to restore the internal state when you reload your save file, so that, for instnace, if you save and quit while looking at a set of card rewards, but haven't made your choice yet, when you reload, you will see the same set of rewards (you can't just reload your save to reroll).

This doesn't really have any impact on the gameplay, and isn't related to the correlation problem, it's just a constraint on the class of RNG algorithms in use, they need to be deterministic with recoverable state.