Supporting two renders: one for basic scene, one for HUD

[SolomonSHY]

Hi, any help would be appreciated! I'm trying to render twice, one for the main scene and one for a Heads Up Display. I'm following the example here: http://codepen.io/jaamo/pen/MaOGZV
Although the HUD displays correctly in normal mode, I'm getting blank screens in WebVR mode (left eye white and right eye black). Has anyone encountered this issue?

// ---- Renderer
renderer = new THREE.WebGLRenderer( {
antialias: false,
alpha: true
} );
renderer.setSize( WIDTH, HEIGHT );
renderer.setPixelRatio( pixelRatio );
renderer.setClearColor( 0x000000, 1 );
renderer.autoClear = false;
container.appendChild( renderer.domElement );

//animate function
// Render the scene through the manager.
renderer.clear();
manager.render(scene,camera,timestamp);
manager.render(sceneHUD,cameraHUD,timestamp);