Issue description:

user tried to autocraft a recipe whitch worked in former version.

What you expected to happen:

craftin of recipe (it was an easy draconic evolution core)

• Minecraft: 1.12.2
• Forge: 1.12.2-14.23.0.2512
• Refined Storage: 1.5.21

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

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

crash-2017-10-22_18.12.15-server.txt

Issue description:

Multiple crashes trying to autocraft.

What you expected to happen:

craftin of recipe (The crash-2017-11-01_09.55.21-server.txt was an attempt to craft 10 crafters.)

Minecraft: 1.12.2
Forge: 1.12.2-14.23.0.2517
Refined Storage: 1.5.21
Does this issue occur on a server? [yes/no]
yep, server

crash-2017-10-31_16.27.38-server.txt
crash-2017-10-31_16.37.20-server.txt
crash-2017-11-01_09.55.21-server.txt