You don't get an empty bottle back when using dragons breath in a brewing stand

If you use dragons breath in a brewing stand you don't get the empty bottle back. 

How to reproduce:

1. Get a brewing stand that has blaze powder as a fuel
2. Put splash potions in it. 
3. Put dragons breath in it. 
4. Wait until the brewing stand finished. 

What I observed: There was no empty bottle, the dragons breath disappeared with the bottle.

What I expected: In the slot is an empty glass bottle.