I’ll keep this one short and sweet.
My version is from November 20th, 2019. No mods, default settings. Only one tileset added.
In the [Dry] section of the [Food] category, there are two options for crafting dried foodstuffs for both Meat and Vegetables. The first option in the list uses the ingredient, dehydrator, and a fire-source charge with the process taking 20 minutes, the second option uses the ingredient, fire-source charge, and 18 minutes.
Looking at the two lists, the -only- difference I can see is the use or lack thereof of the fire-source charge and the factor of time.
After testing, there are no additional prompts aside from ingredient choice, so this isn’t a matter of choosing your heating option or anything.
From what I can see, using the fire-source charge essentially uses an extra ingredient, fire, and costs you an additional 2 minutes without any other effects.
I can’t say what the initial intent with this crafting choice was with certainty, but it was likely not coded correctly as this crafting version, as it is, is 100% redundant and unnecessary as the recipe without the fire source takes less time to the exact same effect.
Probably an easy fix once you realize it is there.