KDE #lokalize and #ibus both apps are stop working together again with KDE Plasma (wayland) Fedora 40. with Fedora 39, switched from ibus to xkb input method for the same reason.
Good news is that There are lof of work by KDE volunteers for migrate to KF6 recently, like:
https://invent.kde.org/sdk/lokalize/-/commit/d59717e896c42f930c7dde66eea8406177fb9f4b
Really Appreciate the efforts. Hopefully that will help to fix the input issue.