Spacebar button not working on IBUS

Hi, I am a Korean Manjaro user who is very satisfied with the strong support base here in Manjaro Forum. Today I ran into another problem in which the spacebar button does not work in Libre Office Writer. To be specific, whenever I press the spacebar button on the keyboard while writing something in Korean on Libre Office Writer, simply nothing happens like I don’t press any button. The spacebar button works fine when I type in English, but this problem is unique to typing in Korean characters. I use IBUS as the input method and I hope someone can help me out with this. Thanks.