Modifier keys and fcitx5 are weird on GTK programs

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1

I’m not sure if these 2 have same causes but their symptoms sounds similar so I’m asking both on same thread.
I am unable to type out Korean using fcitx5 on gimp. It used to work, but I forgot since when it didn’t. Korean characters are composed of multiple characters, so I’d need to type multiple keys to input one character. However GIMP writes a character for every character, and I can’t compose them. Text in below image is example of this

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It should say “가나다라마바” not “ㄱㅏ ㄴㅏㄷㅏㄹㅏㅁㅏㅂㅏ”

Modifier keys works on GIMP but not on KiCad. I can’t use shift for capitalization, I can’t erase character, I can’t copy/paste texts with CTRL+C or V. The mouse works though, I’ve been dragging section of text I want to remove and typed replacement character and using mouse to copy/paste texts to get around it but it’s getting tedious as you could imagine.
I think there was other python app using gtk that had same problem so I’m guessing this is also gtk problem. I think it was opencv’s preview window?

I’m using Neon 24.04 with KDE plasmashell version 6.3.2

2

Try turning off “Show pre-edited text in program” in the configuration, this will allow the compiled text to be previewed in the IME input box and not in the program, I always turn this option off.

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3

I’m not sure what the exact name of this option is in Korean/English as I use a different language, you can find it on the second page of Fcitx5 settings (Global Options), in the second column (Behavior), in the third entry.

4

Sorry for late reply, Yeah that option seems to work in gimp but only until I press ctrl
The ctrl shouldn’t do anything regarding what I actually end up typing. But for some reason if I even tap ctrl once the problem occurs again.
If i create new text box, it gets fixed but still only until I press ctrl

5

I did some investigating and found out it’s related with fcitx5. If I use x11, it works, since it doesn’t have fcitx5. If I kill fcitx5 on wayland, it also works.
Strange…