Keyboard layout change with ET6

Strange problem. It took me a long time to find that ETS6 changes the layout of my keyboard.
For a few months, apparently by chance, I noticed that the keyboard layout was changing, without being able to understand why and how to restore the standard one without restarting the computer. Over time I have been able to verify that this only happens using ET6, but I still don't know during which activity.
You have news that this also happens to other users_ {this was supposed to be a question mark but I'm typing with the modified keyboard ...}
Best regards