When breaking (I think any) multiblock, it drops itself plus the broken block. I have tested this with a crusher, metals press, arc furnace, squeezer, mixer and diesel generator. (It also appears that you have to rebuild all powered multiblocks for them to work).

The dropped multiblock can be placed again like this:

Minecraft 1.12.2
Minecraft Forge 14.23.2.2611
Immersive Engineering 0.12-79
Full Modlist

Do you have any other mods installed? If so, full modlist with versions please, and try to replicate this issue with just IE installed

This is done in a clean testing environment.

Probably caused by e698097.

This started right after this last update, ImmersiveEngineering-0.12-79

I got three from the bucket wheel I broke.

When you place them they are a single invisible block.

i dont know if it helps but i had a simliar problem the coke oven dropped itself and you could not extract the
creosote oil .

The fix is released now