Issue description:

I have attached an external storage to the black hole controller, and the item stored are seen as doubled

What happens:

The items are showed x2 instead of proper number

What you expected to happen:

The external storage should see the black hole controller as a single inventory

Steps to reproduce:

1.attach an externa storage to a Black hole controller
2.Profit

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

• Minecraft:1.16
• Forge:36.2.8
• Refined Storage:
  refinedstorage-1.9.15.jar

Does this issue occur on a server? yes