I was playing as Allayi, building some Minor Faction units (Demons) that used Adamantium. I left clicked a few units then cancelled them as I wanted them at the top of my queue. I then shift + left clicked on them to add them to the front  of the queue. I removed some extras and noticed my Adamantium reserves were lower. I cancelled the rest and noticed I did not get the Adamantium back. I kept testing this (adding with shift + left click and removing) until I had only 2 Adamantium left and no units in the queue. Reloaded my autosave to avoid the issue.