Problem with cedilla on Electron apps

Hi there, First of all I would like to apologize if this question is very “newbie”. And, of course, I would like to say that I am really liking NixOS. But happens I don’t know what to do more in order to fix this problem. I already searched a lot and was not able to solve the problem. I installed NixOS + KDE Plasma a few days ago and I am really enjoying it. The only problem that remains is that one regarding “cedilla”. I use the US english alt intl keyboard layout and all accents works well...