Attach to running application with gdb sometimes freeze QtCreator

I have random freeze of QtCreator when I start a debug session, using the "Attach to running application" window, and clicking on "Attach to Process" after having selected the process I want to debug.

I do not know how can I give more information, I do not see any specific log, and the application just need to be killed.
It could happen every 1 out of 3-5 debug session.