[BigSur] Button does not resize in function of its Text child anymore

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15

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

    Button {
        anchors.centerIn: parent
        Text {
            anchors.centerIn: parent
            text: "Hello, world!"
        }
    }
}