Webgl flicker when used with qt quick 2 QtWebKit 3.0

When opening a webgl page using the WebView component in QtQuick 2, the webgl page rendering suffers from intense flickering.
I tried running similar code under QtQuick 1 with the older version of the QtWebKit import and it renders fine.

Here are the two codes samples :

Rendering blinks in qt quick 2 project

import QtQuick 2.0
import QtWebKit 3.0;

Rectangle {
width: 800
height: 600

WebView

{ url: "http://learningwebgl.com/lessons/lesson03/index.html" anchors.fill: parent }

}

Works fine in a qt quick 1 project

import QtQuick 1.1
import QtWebKit 1.0

Rectangle {
width: 800
height: 600

WebView

{ url: "http://learningwebgl.com/lessons/lesson03/index.html" anchors.fill: parent }

}