On Industrialcraft-2-2.2.802-experimental using forge 1.7.10-10.13.4.1566 I found a possible bug with EU-reader.
Right clicking on a drawer puts it in a drawer, but the item doesn't leave your inventory. You can't get the EU-reader out from the drawer either, but trying to take something else out from the same drawer takes EU-reader out again, but it disappears from your inventory and from the drawer, thus destroying it.

I haven't had time to try all possible permutations of the bug yet, but I'll try to find time for that and report later.

I've noticed similar things will happen with any tool-like item that has a right-click ability. Wrenches, Thaumcraft tools like Pickaxe of the Core, Multimeters, Conduit Probes, etc. It almost seems like the server and client disagree on whether the tool's action or the drawer's action is used.