Qt Quick Controls: Palette role values don't get live updates

import QtQuick
import QtQuick.Layouts
import QtQuick.Controls.Basic

ApplicationWindow {
    id: window
    width: 600
    height: 300
    visible: true
    palette: paletteButton.checked ? grayscalePalette : coloredPalette

    property color accentColor: Qt.color(Qt.hsla(slider_color.value, 0.5, 0.5))

    Palette {
        id: grayscalePalette

        window: "white"
        windowText: "black"
        buttonText: "black"
        button: "lightgrey"
        text: "black"
        dark: "black"
        mid: "black"
        midlight: "black"
        light: "black"
        highlight: "black"
        highlightedText: "black"
    }
    Palette {
        id: coloredPalette

        window: "white"
        windowText: window.accentColor
        buttonText: window.accentColor
        button: "lightgrey"
        text: window.accentColor
        dark: window.accentColor
        mid: window.accentColor
        midlight: window.accentColor
        light: window.accentColor
        highlight: window.accentColor
        highlightedText: window.accentColor
    }

    GridLayout {
        anchors.fill: parent
        columns: 3

        Label { text: "Palette" }
        Button {
            id: paletteButton
            checkable: true
            text: checked ? "Grayscale" : "Colored"
        }
        Item { Layout.fillWidth: true }

        Label { text: "Color" }
        Slider { id: slider_color }
        Rectangle {
            color: window.accentColor
            Layout.preferredWidth: 20
            Layout.preferredHeight: 20
        }
    }
}

onAccentColorChanged: {
    if (!paletteButton.checked) {
        paletteButton.checked = true
        paletteButton.checked = false
    }
}