Factorio Forums

Just to clarify, this talks about centrifuges that were never powered to begin with, not ones that ran out of power in the middle of a recipe.

Steps to reproduce:
1. Build a centrifuge detached from the electric network.
2. Set a recipe (I personally tested it on Kovarex EP).
3. Put all required ingredients into the centrifuge.

Result:
Centrifuge lights briefly turn on (for 1 tick) and ingredients are consumed.

Expectation:
I want my U235 back!

Here's a save-file that's set up in editor in a fresh world. If the game is advanced 1 tick in /editor, it will do exactly what Dev-iL describes.

Thanks for the report. I don't consider this worth changing since all it will do is add additional overhead to every assembling machine and furnace every time they consume items when in the majority-meant-to-be-used-that-way case they have power and will craft the recipe they consumed the items for.