Futurepack-1.10.2-24.2.144
When you pick a Wardrobe to pick it up, it keeps it's contents, which is a great feature, but certain items drop to the ground from inside the wardrobe when you do. These include: Opti Bench, Laser Turret & Machine Board. There may well be others, but those are the ones that it happened with for me, and it is a repeatable problem.

There is another oddity:
Similar wardrobes picked from dungeon (the large dungeon in my case) do not stack once emptied, but they do stack if you place them in same location/coordinates, empty by hopper (haven't tried the same manually) and break... (place one, break, place next, break...)
Same goes for some other blocks at 1.10.2-24.2.144 like block breakers. Yet crafting station and some other types of wardrobes (probably ones with four rows of inventory) stack without issues if emptied.

This is not an issue it is intendet. The items droped have an nbtag already store data. This feature prevents world corruption by stacking to many inventorys in each other.

In the 1.11 we wil change this to actually check the NBT size, so also other mods backbakcs will drop, but smaller items with NBT will still remain.