I imagine it's very much wip (On 1.18, at least) but I'd rather report just to be sure

Examples:
Throw in 1 hex ash -> gets returned
Throw in 4 hex ash -> gets turned into 4 void salts
Throw in 5 hex ash -> gets turned into 5 void salts

The way the recipe is structured here makes it seem that for every 4 hex ash you throw in you'd get 1 void salts.

Yeah, I suppose I didn't test it. It'll probably lose it's quantity capability anyhow, it makes more sense that way

Fixed in dev version