(question)ibus-pinyin freezes in stumpwm

[wxie2017]

environment:

Debian GNU/Linux 12 - minimal installation without any desktop
apt install xorg, sbcl
apt install stumpwm
install ibus-pinyin

init files:
.bash_profile
ibus input

export GTK_IM_MODULE=ibus
export XMODIFIERS=@im=ibus
export QT_IM_MODULE=ibus
ibus-daemon -drxR -v &

.xinitrc
#!/usr/bin/env bash

eval gnome-keyring-daemon --start --components=gpg,pkcs11,secrets,ssh
export GNOME_KEYRING_CONTROL
export SSH_AUTH_SOCK
export GPG_AGENT_INFO
export GNOME_KEYRING_PID
eval $(ssh-agent)

exec /usr/bin/stumpwm

setup:
im-config -c
use default

ibus-setup
input method: I see English - English (US); I click ADD; then the setup window freezes, and I can C-c to kill it.
The Chinese keyboard input method cannot be activated using s-SPC or any other methods.

What I miss in the process?