Just to attach it here, im playing a modpack that haves IC2Classic and Immersive Engineering.
One of IE's machines, the "assembler" is really useful since it can automatically use fluids in recipes that use filled containers, like buckets, etc... so i made one to automate "coolant cell" production", but i ended up discovering some problems involving IC2's recipes that use fluids...
Yeah these problems are really specific and just happens in a machine that inputs items and fluids at the same time to make "crafting table recipes", but i think it can provide useful inofrmation for maybe some updates in IC2C's way of configuring some crafting components (like the cell not being recognized as a "container" by other mods, i imagined it could be fixed by adding forge tags to lots of IC2's items)

all this was just an explanation for why i posted this issue here, but i posted more info here: BluSunrize/ImmersiveEngineering#5864 (comment)

@ChangeOtaku answered on BluSunrize issue :)
Pretty sure its a problem in his mod but lets see if we can work things out.

thanks for the attention :)