GridLayout does not emit property changes when changing some properties

import QtQuick 2.12
import QtQuick.Window 2.1
import QtQuick.Layouts 1.3Window {
    visible: true
    GridLayout {
        id: grid
        columns: 3
        columnSpacing: 5
        Text { text: "Three"; font.bold: true; }
        Text { text: "words"; color: "red" }
        Text { text: "in"; font.underline: true }
        Text { text: "a"; font.pixelSize: 20 }
        Text { text: "row"; font.strikeout: true }
        onColumnSpacingChanged: console.log("column spacing Changed")        // No Output
        layoutDirection: Qt.RightToLeft
        onLayoutDirectionChanged: console.log("Layout Direction Changed")    // No Output
    }   Timer
   {
       interval: 500
       running: true
       onTriggered: {
           grid.columnSpacing=20
           grid.layoutDirection=Qt.LeftToRight
       }
   }
}