Metal forge taking items from the first stack of item and didnt take from other stack

[MrPolloo]

Description (REQUIRED)

When using a metal forge, the metal forge taking items from the first stack, but it didn't take from another stack.
Before using metal forge

After using metal forge

Steps to reproduce the Issue (REQUIRED)

Just use metal forge

Expected behavior (REQUIRED)

The metal forge must take items one each stack from the recipes like other basic machine.

Server Log

Environment (REQUIRED)

• Server Software (Spigot/Paper): Spigot
• Minecraft version: 1.15.2-R0.1-SNAPSHOT
• CS-CoreLib version: DEV - 79 (ec5b4c24)
• Slimefun version: RC - 16 (git7ce2793d)
• LiteXpansion version: DEV 72 (git b39c2)

[Ac3ofSpad3]

Same issue occurs while creating Mixed Metal Ingot.