Factorio Forums

Normally multiple inserters (A,B) on the same building move in alternating order, (ABABABAB...). After a mod update the game forgot where it was end I ended up with ABABAABABAB...

This might sound like a minor bug to you, but in my circumstances it is pretty big. I'm playing Ultracube, and (attention, spoilers ahead) I did build this in a way that it relies on the alternating inserter order and then I (accidentally) saved in the middle of the process and updated a mod (only changes in locale/control.lua).

Maybe the correct alternating inserter order isn't that difficult to restore and was only missed because someone deemed it unnecessary. Fingers crossed.

There are no guarantees about inserters order taking items, after mod update when prototypes changed is triggered, all inserters will wake up so they can reevaluate if they should start working or not and whoever updates first will win and take the item. Even if they are sleeping they can wake up, block and switch order. It was never part of the design to make it reliable in any way. As such i am going to claim this is Not a bug. If you want to enforce some special order you could enable/disable inserters with circuit network.