Issue description:

What happens:

I pulled 1 piece of Red Matter from ProjectE into normal Storage Drawer. Then i opened Grid and shiftclicked to take it.

What you expected to happen:

I expected to get 1 piece of Red Matter but instead of that i got 2 stacks of it.

Steps to reproduce:

...

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

• Minecraft: 1.12
• Forge: 2443
• Refined Storage: the latest one

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]

Can't reproduce this.

Also don't create issues with "the latest one" as RS version, it's bad ™.