Pixi Canvas is coming white on mac safari

Hi,

    I am trying to display only the text content which is there in pixi example port. Everything is working fine in all the browsers except safari. Earlier it was working fine but from past 2 days it is showing only the white screen. All the assets and sounds are loading in background and I am able to play the sound and all but there is no visibility. Is there any specific reason for this or am I missing something ?. I have added the example script also. Any help will be appreciated. 

Thanks in advance.

var app = new PIXI.Application(800, 600, {backgroundColor: 0x1099bb});
    var element = document.getElementById('gameCanvas');
    element.appendChild(app.view);

    var basicText = new PIXI.Text('Basic text in pixi');
    basicText.x = 30;
    basicText.y = 90;

    app.stage.addChild(basicText);

    var style = new PIXI.TextStyle({
        fontFamily: 'Arial',
        fontSize: 36,
        fontStyle: 'italic',
        fontWeight: 'bold',
        fill: ['#ffffff', '#00ff99'], // gradient
        stroke: '#4a1850',
        strokeThickness: 5,
        dropShadow: true,
        dropShadowColor: '#000000',
        dropShadowBlur: 4,
        dropShadowAngle: Math.PI / 6,
        dropShadowDistance: 6,
        wordWrap: true,
        wordWrapWidth: 440
    });

    var richText = new PIXI.Text('Rich text with a lot of options and across multiple lines', style);
    richText.x = 30;
    richText.y = 180;

    app.stage.addChild(richText);