@8BitCrab Okay so I looked at it again, put like a couple of spools on maintain then put something that uses spools of thread then put spools of thread in the queue as just crafting and like go to another crafter then comeback or wait to see what the weaver makes, that’s exactly what I did an had this happen two times.
This reminds me of something mentioned a long time ago. That if the UI refreshed, the first item on the recipes list was selected automatically and you added it unconsciously to the queue because you thought you had another item selected.
However, it’s not the same case here, since you clearly saw the spools on the queue. Might be hard to reproduce, yeah