X input method (XIM) related

Hi!
Recently I upgraded from debian buster to bookworm and my xim is behaving funky.
I normally use urxvt for terminal job and firefox for web browsing. Changing input language with buster was no problem. I could type hangul(korean character set) both in the terminal and web browser. Now I can't.

Following is my .xinitrc file

Code:

export XIM=nabi
export XIM_ARGS=
export XIM_PROGRAM="nabi"
export XMODIFIERS="@im=nabi"
export GTK_IM_MODULE=nabi
export QT_IM_MODULE=nabi

xset -b
xset -dpms
xset s noblank
xset s off

What I've found out so far is that in the 'xterm', I am able to change the input source and type hangul, after starting nabi in the urxvt. Also, if I fire-up chromium in xterm, I am able to switch input. However, without starting from xterm the input source never changes.

I am clueless how to fix this issue. Would love to know why staring off from xterm is actually working.