Describe the bug
What went wrong?

Breaking double (block-like) Smooth Stone Tiles Slab returns only one slab, instead of two.
This is unlike vanilla Minecraft (e.g. Cobblestone Slab).

To Reproduce
What were you doing when the bug happened?

Place two said slabs in the same block to get full block, then break it to only get one slab back.

Environment
What version of the mod were you using? Are you on singleplayer or multiplayer?
Multiplayer (https://www.curseforge.com/minecraft/modpacks/all-in-one-modded-one-block) with eidolon-0.2.7.jar

Crash Report
N/A