QtCreator becomes irresponsive when running a project while cdb is stopped at a breakpoint

QtCreator freezes when I follow the scenario :

1. Run a program through QtCreator
2. Attach CDB (button play debugger in output panel)
3. Fall in a breakpoint
4. Make modifications in source
5. Type Ctrl+R to run the new version

In this case, QtCreator freezes and Ctrl+Alt+Del blocks the computer. I can't open taskManager (it won't), and command line to kill the program doesn't work.

Then a timeout (~30 seconds) happens and QtCreator killes cdb.exe and everything works fine again.

The only solution I have is to wait or to keep TaskManager open, just in case.