Factorio Forums

When attempting to queue up 3 electronic circuits (green) quickly via manual production you will craft an excess 3 copper cable.

It will queue up as follows:

2 copper cable, 1 electronic circuit, 2 copper cable, 1 electronic circuit, 2 copper cable, 1 electronic circuit.

This results in 4-3+4-3+4-3.

This continues to function until crafting is finished. I stopped at 50 due to only having 100 copper plates onhand at start of testing of this.

This is due to the change that queued items are not counted for new production input.
NaB.

Loewchen wrote:This is due to the change that queued items are not counted for new production input.
NaB.

-0.13.14
Surplus items from crafting are again available for crafting other items. For example, crafting two green circuits will no longer result in two extra copper wires in the player's inventory. This only applies to items that are automatically crafted as a prerequisite; items the player has explicitly requested to craft will not be used to satisfy the dependencies of any further orders.

Appears it was a bug. On the plus side they fixed it.