Hello, I found a nasty bug in crafting UI that makes my stuff disappear. Just follow these steps:
1. Open Boots crafting blueprint.
2. Fill in the slots in following order: Any leather, Any foam, Boot soles, Any metal plate. Like this
http://imgur.com/a/ZwYBQ.
3. Move the plate into leather slot.
4. Leather is gone!
I am playing version 1.0.1.10 from GOG on Win 7.