UI glitches when using Style Sheets (*.qss style files)

[tarkh]

Hello! If I just select some color scheme, everything works fine. But if I try to enable Style Sheets, i.e. tooltip-simple.qss (or any other), then my color scheme starts to glitch - some parts of background color, borders, etc. looses all colors from selected scheme. When disabling any of *.qss in Style Sheets, glitch disappears.

qt6ct enabled with export QT_QPA_PLATFORMTHEME="qt5ct" in ~/.profile