When loading a save that had a trade platform in use, it will return with compound and some scrap and not the resource requested. Scrap may be lost if more than 8 comes back.
I saved in the middle of the trade platform being used, and when i loaded the game the platform brought back 6 compound and 2 scrap, assuming that I lost 1 scrap in the process. I was attempting to get hematite before I saved, and didn't realize the trade platform hadn't returned yet.
Version / Build Number: 1.0.9