Timer: set to "running" with property binding, the timer never starts again in some situation

Rectangle {
    id : rect
    property bool active:false

    Timer {
        id: timer
        running: rect.active
        interval: 500
        onTriggered: {
            // if the running property evaluates to false on Triggered,
            // the "running" property will have never been to set true again even if the binded property is true.
            rect.active = false
            console.log("fire")
        }
    }
    Switch {
        anchors.bottom: parent.bottom
        onClicked: {
            rect.active = checked
        }
    }
}