We get the Leather Belt automatically when we advance to the 5th level in the Kithgard Dungeon Campaign. It looks like a sword hilt so it makes sense that we get the sword and belt together.
However it is not awarded as part of completion of Forgetful Gemsmith or if you just complete the Kithgard Mastery level.
And when I remove the belt it disappears from my inventory. I can get the belt back by loading an earlier level that has the belt equipped and then playing a new level.
Is this a bug? Is there something not being set for the Leather Belt like the rest of the equipment ? I know the belt does not add very much, but it is better then nothing.