Issue description:external storage capacity when attached to storage drawers is showing capacity far exceeding max

What happens:external storage capacity when attached to storage drawers is showing capacity far exceeding max

What you expected to happen:external storage to behave as normal

Steps to reproduce:

1.attach external storage to storage drawer controller
2.
3.
...

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

• Minecraft:1.12
• Forge:14.23.5.2838
• Refined Storage:1.6.15

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

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

[pastebin/gist/etc link here]

This issue is with storage drawers reporting wrong numbers. The numbers are purely visual and as such can be safely ignored.