SameGame example project leading to inconsistent state of Qt Creator

When starting creator, opening samegame example from the welcome page and then playing around it can be seen that the Qt Creator state gets somewhat inconsistent.

Procedure:

• after opening that project, click on "Start Debugging" (or F5), then on "Run" (or Ctrl + R), then again F5
• then click on this little green arrow-button with tooltip "Re-run this run-configuration"

Effect: every time you click on "Re-run this ..." you'll see the samegame output is duplicating. So after clicking "Re-run ..." three times, you'll get four output messages, and so on.