@Kuhic_Pasquale I have seen that the space issue is for Keyman for Windows it is not just on Windows 11 but also on Windows 10. I also know why it is not working.
Have you ever had this work you on Windows?
We will work on fixing the Windows deskton version. In the meantime, there are some alternate solutions that may work for you.
The KeymanWeb.com Korean_RR keyboard does work - at this link. You can type here and copy the text to your Windows application.
The Korean KORDA Jamo (SIL) keyboard creates Korean hangeul from jamo letters each time you press Spacebar.
There are a few other Korean Keyman keyboards that combine jamos each time you press space, however, I’m not sure if they are a suitable alternative for you. Korean Keyboards Link.