Item.antialiasing broken when layer.enabled=true

import QtQuick 2.12
import QtQuick.Window 2.12

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    Row {
        anchors.centerIn: parent

        spacing: 64

        Rectangle {
            width: 200
            height: 200
            color: "black"
            rotation: 51
            antialiasing: true

            Rectangle {
                anchors.fill: parent
                anchors.margins: 64
                antialiasing: true
            }
        }

        Rectangle {
            width: 200
            height: 200
            color: "black"
            rotation: 51
            antialiasing: true
            layer.enabled: true
            layer.smooth: true

            Rectangle {
                anchors.fill: parent
                anchors.margins: 64
                antialiasing: true
            }
        }

    }
}