Preview opens in the same window when edit panel was previously another Preview window

[hd-J]

Steps to reproduce:

1. Create a new post, save as draft
2. Click "Preview"
3. Go to the Preview window, and from there use the Admin bar to go back to the Dashboard and start writing a new post
4. Save that new post as draft
5. Hit "Preview"
   • Expected result: preview opens in a new window
   • Result: preview opens in the same window

Is there some way we could get around that? For people working with multiple tabs, it can be really confusing.