https://bugzilla.redhat.com/show_bug.cgi?id=1815510
--- Comment #4 from fujiwara tfujiwar@redhat.com --- (In reply to edward.park0203 from comment #3)
I think this is related. Pressing keys in this order: ㄱ -> ㅏ -> ㄴ -> ㅏ -> ㄷ -> ㅏ -> <Space> should result in "가나다 ". Instead, it becomes "가나 다". Right before pressing space it's "가나다(cursor here)". After pressing space it becomes "가나 다(cursor here)".
It's a different issue. Can you file a new bug in Red Hat bugzilla? I think you use GNOME Wayland but not Xorg. https://github.com/ibus/ibus/issues/2156
The workaround is to export GTK_IM_MODULE=ibus