Preloading screen not centered

Phaser 3
1

In a modal window once the game is loaded it corrects itself and centers but the preloader (prior to loading) isn’t centered.

	function Preloader ()
    	{
		Phaser.Scene.call(this, {
			key: 'preloader',
			pack: {
			    files: [
			        { type: 'image', key: 'loading', url: '../images/game/loading.png' }
			    ]
			}
		});
	}