Issue description:

When I try to put an IC2ex liquid cell into the Fluid Grid, it only recognizes one liquid.

What happens:

You can get one empty cell.

What you expected to happen:

Steps to reproduce:

1. Introduce Refined Storage and IC2ex.
2. Set up "Controller", "Fluid Grid", "Disk Drive" and "Fluid Storage Disk"
3. Prepare two or more Ic2ex liquid cells
4. Shift or right click to enter Fluid Grid
   ...

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

• Minecraft: 1.12.2
• Forge: 14,23,5,2838
• Refined Storage: 1.6.15
• (IC2ex): 2.8.170-ex112

I also have this issue. It is related not only to IC2ex fluid cell but to every single stackable fluid container from any mod.

Duplicate of #2187