Git: Stash list dialog resets to top project on "Show"

1. Unzip the project
2. Do

   top/ % git init
   top/ on master % git add README top.pro
   top/ on master % git commit -m "initial top commit"
   top/ on master % cd mysub
   top/mysub/ on master % git init
   top/mysub/ on master % git add *
   top/mysub/ on master % git commit -m "initial sub commit"
   top/mysub/ on master % vim main.cpp    # Add some line
   top/mysub/ on master % git stash save  #  ... and stash it
   top/mysub/ on master % vim main.cpp    # Add another line
   top/mysub/ on master % git stash save  #  ...and stash it
   

3. Open the attached project in Qt Creator
4. Menu: Tools > Git > Local Repository > Stash > Stashes... - in the dialog is the stash visible for mysub with two entries, good.
5. In the dialog: Click "Show" - a diff view will be shown in the background, but the stash list is now empty (unexpected), probably because the repository switched to the "top" repository (due to the diff view?), which does not have any stashes.

Thus, I cannot inspect one stash after the other.