SwipeDelegate not always emits swipe.complete

import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Controls 2.0
import QtQuick.Controls.Material 2.0
import QtQuick.Layouts 1.3

ApplicationWindow {
    id: window
    width: 360
    height: 360
    visible: true

    Shortcut {
        sequence: "Ctrl+Q"
        onActivated: Qt.quit()
    }

    ListView {
        anchors.fill: parent

        model: ListModel {
            id: listModel
            Component.onCompleted: {
                for (var i = 0; i < 100; ++i)
                    append({text: "SwipeDelegate" + i})
            }
        }

        delegate: SwipeDelegate {
            id: delegate
            width: parent.width
            text: model.text
            down: pressed || swipe.complete

            onClicked: {
                console.log("CLICK at "+swipe.position)
                if (swipe.complete)
                    listModel.remove(index)
            }

            Switch {
                parent: delegate.contentItem
                anchors.right: parent.right
                anchors.verticalCenter: parent.verticalCenter
            }

            swipe.behind:
//                Pane {
//                padding: 0
//                width: parent.width
//                height: parent.height
                Label {
                    text: "Remove"
                    color: "white"
                    width: parent.width
                    height: parent.height
                    horizontalAlignment: Qt.AlignHCenter
                    verticalAlignment: Qt.AlignVCenter
                    background: Rectangle {
                        color: Material.color(Material.Red, delegate.pressed ? Material.Shade800 : Material.Shade500)
                    }
                }
//            }

            ListView.onRemove: SequentialAnimation {
                PropertyAction { target: delegate; property: "ListView.delayRemove"; value: true }
                NumberAnimation { target: delegate; property: "height"; to: 0; easing.type: Easing.InOutQuad }
                PropertyAction { target: delegate; property: "ListView.delayRemove"; value: false }
            }
        }
    }
}