KDE Plasma Fcitx issues

Though it might be in bad taste to link to external posts, I have already detailed my Fcitx woes on Reddit: https://www.reddit.com/r/kde/comments/dl5r94/kde_plasma_keyboard_issues/

Does anybody have any clue as to what could be amiss here?

Does nobody really have any clue as to what has been going on for so long? To note, it is still going on.