Summary: When accepting a build request from a wandering trader, in exchange for bolts of cloth, the cloth awarded is not placed into stockpiles.
Steps to Reproduce:
Play a ton until you get a trader offering cloth bolts
Accept and fulfill build request
Expected results: Cloth is stashed away
Actual results: Cloth is not stored in any stockpiles, including stockpiles that accept all items.
They are not used in their free state either.
Placing stockpiles underneath them accepts them and allows for their use.