'Entity Reference to taxonomy' Field in chosen format is not allowing to add new terms?

Question

I Installed Chosen module and I have created field referencing to a taxonomy in one of my content type. But this is not taking the newly entered term, though i checked 'create new term if not exist' in manage field settings as shown in below image:

Or Any idea How to remove tid from autocomplete selection.Same question is already asked before like in link1 ,link2, but i didnt get proper solution.