I discovered this today by accident and have been able to consistently reproduce it on fresh 3.83 saves. Apologies if this is already known, but I didn't see anything.
Steps to reproduce:
- Select "Haft a weapon or tool" from the Hafting menu
- Attempt to haft an invalid item (knife, axe, staff, whatever)
- Receive an error message stating "Huh? It's not possible to haft [item]!"
- Check inventory and notice item is now gone
- Repeat as desired
Expected behavior:
You should receive an error message but the item should not disappear.