What happens:

What you expected to happen:

Steps to reproduce:

...

Affected Versions (Do not use "latest"):

• EnderIO-base-1.12.2-5.0.642-nightly
  EnderIO-conduits-1.12.2-5.0.642-nightly
  EnderIO-conduits-appliedenergistics-1.12.2-5.0.642-nightly
  EnderIO-endergy-1.12.2-5.0.642-nightly
  EnderIO-integration-forestry-1.12.2-5.0.642-nightly
  EnderIO-integration-tic-1.12.2-5.0.642-nightly
  EnderIO-invpanel-1.12.2-5.0.642-nightly
  EnderIO-machines-1.12.2-5.0.642-nightly
  EnderIO-zoo-1.12.2-5.0.642-nightly

• EnderCore-1.12.2-0.5.37

• Minecraft: 1.12.2

• 1.12.2-forge1.12.2-14.23.4.2738

• SpongeForge? what it is?

• Optifine? yes

• Single Player

Your most recent log file where the issue was present:

[pastebin/gist/etc link here]
https://pastebin.com/QYRiaRwF
https://pastebin.com/ujyz8BVv

With what software a problem?

cofh is duplicating vanilla functionality under the same name. Very easy to select the wrong one...