Issue description:

did a craft of 10k items at once via shiftclicking output of a crafting recipe and broke the entire system all the items wont show up

What happens:

system entirely broken no items shown

What you expected to happen:

lag but not broken items

Steps to reproduce:

1.add stackup mod and refined storage
2.change the stack size to a high number
3.craft an item out of refined storage and shift click the item out
...

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

• Minecraft:1.12
• Forge:forge-14.23.5.2854
• Refined Storage:refinedstorage-1.6.16.jar

Does this issue occur on a server? [yes/no]
maby not tested
no crash log

1.12 is unsupported