I had some issues with KiCad freezing. It seemed to happen randomly but I noticed it was pretty consistently freezing when I clicked on a box to enter text (like setting the grid offset, etc).
I found this post:
In it marekr mentions that issue could be do to the IME bug.
As it happens, some software at work I use had a similar issue with IME causing freezing.
The workaround for that was to go to the IME settings (Windows 10, not sure about 11) and find the option for “Use previous version of Microsoft IME” and make sure that box is selected.
I tried this with KiCad and the freezing issue went away.
Just in case someone else with an IME input is struggling with freezing, maybe give this a shot.