Noticed most commonly when building rafts but if you've added say a large stick to the build then try to add a cloth, stick, or something from the backpack it consumes the items. I've adjusted how I approach building to ensure I always complete a specific material before moving to the next but losing some of the more valuable materials is disheartening.
#Losing items when adding to builds
placid lotus
Should clarify that the item is consumed but not added to the build. You just flat out lose the item, can't get it back, and have to grab/get more of the item to complete the build after making sure the previous item requirement is met.
empty lintel
Thanks for the report we will look into the issue