JustEnoughResources-1.12.2-0.9.2.60
ImmersiveEngineering-0.12-89
jei_1.12.2-4.15.0.289
forge-1.12.2-14.23.5.2838-installer-win

This is the file created by /jer_profile 1000:
world-gen.json.txt

There is no mention of copper from immersive engineering, and yet as you can see i'm standing on it:

Not supporting 1.12 anymore, will have to rewrite profiling for newer versions.