Pressing and holding a button, then releasing outside of the button never emits released signal

import QtQuick
import QtQuick.Controls

Window {
    id: window
    width: 640
    height: 480
    visible: true
    Text{
        id: text1
        anchors.horizontalCenter: parent.horizontalCenter
        text: "Unheld"
        font.pixelSize: 30
    }
    Button{
        id: button1
        onPressAndHold: text1.text="held"
        onReleased: text1.text="unheld"
        anchors.centerIn: parent
        width: 100
        height: 100
    }
}