It appears some of the recipes are incorrect, I am having issues with Liquid versions of Mekanism gas.
I have 100kb of liquid hydrogen that wont accept into an ae2 crafting recipe even though the recipe calls for liquid hydrogen, both of these say Mekanism liquid hydrogen, I thought I was bugging out but nope, two liquid hydrogens exist for the same mod, you can confirm this by pressing A to hotkey crafting recipe, both listed liquid hydrogens will fit on the crafting hotkey area for JEI.

Had the same issue with Liquid Chlorine, the interesting thing is that I can only "pull" these crafting recipe duplicates through JEI when I'm trying to craft things like "refinery gas" from gregtech inside AE2 autocrafting

Version 0.2.19