Closing Cubase 13

Hi
It has been a couple of weeks that i have not used Cubase 13 and i have strange close downs.
If i use Control Q the program closes down without do you want to save first.
If i try to close the program down using the X in top corner i cannot get rid of Cubase . It just flickers and stays.
So it is closing down without asking me to save, it just vanishes on CONTROL Q or i can close with the X for the main screen, and the start box is left. You cannot close the start box with the X as it goes and comes back immediately. I can get rid of it by QUIT

I do not get on any of these actions – Do you want to save

All the best
john