Editing state for decoy drag and drop item

Hi there, 

I have a slide in one of my quizzes that contains a drag and drop sentence. There are three drop boxes and four drag items. So one of the drag items is an "extra", i.e. a decoy drag item. I am having trouble having the states work correctly for the decoy item. I added an incorrect state where the drag item should turn red if dropped anywhere. But it does not do this. It just stays the "normal" state no matter where it is dropped. 

Any advice?

My file is attached.



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