Issue description:

the game crashed on opening a crafting grid

What happens:

it crashes

What you expected to happen:

not crash

Version (make sure you are on the latest version before reporting):

• Minecraft: 1.12.1
• Forge: 2467
• Refined Storage: 1.5.18

Does this issue occur on a server? [yes/no]
yes

If a (crash)log is relevant for this issue, link it here:

https://paste.ee/p/Jg0Cq

This looks like a Minecraft bug. I cannot reproduce it either.