Live preview not updating in Edit Mode

I am very excited about the ability now to have live preview inside edit mode.  Now I can work on mutliple linked files and view the preview to see those changes.  

Unfortunately it seems that when I make changes to a file that is being used in the file I am running live preview on, the changes aren't updated.

So if I have a control I am working on and I want to view it in context.  I will run the live preview of the main screen it's used on and work on the code in