Having trouble typing in Jp

I recently started replaying after a year break and I used to be able to switch input E - J language with hotkeys on window.
Now I am not sure if the IME or window 11 or the game has changed, I tried using the old version IME, window mode, even tried google jp IME, run the game in administrator mode, it just won't let me.

I also notice the input language switch icon on the IME bar becomes an X when I'm in the game. Any idea?:confused:

You can also switch just by clicking on it. Whether it works in the game I don't know.