Some qt flatpak applications are using the Breeze icons for close/minimize/maximize buttons (GNOME)

For example - Kdenlive:

Is there a way to fix it? I already set a Kvantum theme to KvLibadwaitaDark, and gave access to the Kvantum folder with: xdg-config/Kvantum:ro; I also set a variable: QT_STYLE_OVERRIDE=kvantum

It works nicely on some applications like qbittorrent (except for some bold fonts that looks blurred) but the top bar of other apps like Kdenlive and KeePassXC is using the Breeze icons.