diff --git a/js/controllers/reader.js b/js/controllers/reader.js
index 4558da95..1c65e5ac 100644
--- a/js/controllers/reader.js
+++ b/js/controllers/reader.js
@@ -27,11 +27,6 @@ export default class Reader {
 		const viewportElement = this.Reveal.getViewportElement();
 		const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR );
 
-		// Dimensions of slides within the pages
-		const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
-		const slideWidth = slideSize.width,
-			  slideHeight = slideSize.height;
-
 		viewportElement.classList.add( 'loading-scroll-mode', 'reveal-reader' );
 		viewportElement.addEventListener( 'scroll', this.onScroll.bind( this ) );
 
@@ -43,10 +38,6 @@ export default class Reader {
 			}
 		}
 
-		// Make sure stretch elements fit on slide
-		await new Promise( requestAnimationFrame );
-		this.Reveal.layoutSlideContents( slideWidth, slideHeight );
-
 		const pageElements = [];
 		const pageContainer = slides[0].parentNode;
 
@@ -286,8 +277,8 @@ export default class Reader {
 
 			// Play slide content when the slide becomes visible
 			if( isPartiallyVisible ) {
-				if( !page.playing ) {
-					page.playing = true;
+				if( !page.active ) {
+					page.active = true;
 					page.pageElement.classList.add( 'present' );
 					page.slideElement.classList.add( 'present' );
 					this.Reveal.slideContent.startEmbeddedContent( page.slideElement );
@@ -297,8 +288,8 @@ export default class Reader {
 					}
 				}
 			}
-			else if( page.playing ) {
-				page.playing = false;
+			else if( page.active ) {
+				page.active = false;
 				page.pageElement.classList.remove( 'present' );
 				page.slideElement.classList.remove( 'present' );
 				this.Reveal.slideContent.stopEmbeddedContent( page.slideElement );
diff --git a/js/reveal.js b/js/reveal.js
index d7e376e9..f68aa5bd 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1004,7 +1004,6 @@ export default function( revealElement, options ) {
 	 * @param {string|number} height
 	 */
 	function layoutSlideContents( width, height ) {
-
 		// Handle sizing of elements with the 'r-stretch' class
 		Util.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {