Minecraft Version: 1.12.2
Forge Build: 2590
Mod Version: 0.1.1b

This is only really a concern in packs where water is limited or finite, but I figure it's worth reporting; A cauldron can transform a sponge into a wet sponge with only a single bottle's worth of water, but in vanilla you can put a wet sponge into a furnace and get a full bucket of water back (but putting an empty bucket into the fuel slot before the smelting operation finishes). This would allow you to turn 1/3rd of a bucket into a full bucket.

A simple fix for this is to change the amount of water necessary to wet a sponge into a full bucket's worth.

Thats what happens when you have debug recipes which make too much sense to remove. I mean, I guess making it cost 3 makes sense, though without the exploit the recipe returns to "who would ever do this" level.

Revisiting this issue, I will note that recipe is added in the config file, so you are able to just disable it from there to prevent the dupe.

I did just push a new feature to make sponges a little more useful in cauldrons, which has the option to require cauldrons to be full to make the sponge wet.