mfabian@f41:~$ rpm -q ibus-hangul
ibus-hangul-1.5.5-6.fc41.x86_64
mfabian@f41:~$ rpm -q supertuxkart
supertuxkart-1.4-10.fc41.x86_64
mfabian@f41:~$ rpm -q ibus
ibus-1.5.31-1.fc41.x86_64
mfabian@f41:~$ cat /etc/os-release 
NAME="Fedora Linux"
VERSION="41 (Workstation Edition)"
RELEASE_TYPE=stable
ID=fedora
VERSION_ID=41
VERSION_CODENAME=""
PLATFORM_ID="platform:f41"
PRETTY_NAME="Fedora Linux 41 (Workstation Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:41"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f41/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=41
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=41
SUPPORT_END=2025-12-15
VARIANT="Workstation Edition"
VARIANT_ID=workstation
mfabian@f41:~$ 


Reproducible: Always

Steps to Reproduce:
See also the attached video.

- start supertuxkart
- select the button to edit the username
- click on Rename
- focus the entry field
- select ibus-hangul
- switch to hangul mode
- type `a ` into the entry. 


Actual Results:  
The result is ` ㅁ`. 

Expected Results:  
The result should be `ㅁ `.

I'll attach a video.