diff --git a/packages/components/src/navigator/navigator-screen/component.tsx b/packages/components/src/navigator/navigator-screen/component.tsx
index 6f681034a347e..6a089b466473d 100644
--- a/packages/components/src/navigator/navigator-screen/component.tsx
+++ b/packages/components/src/navigator/navigator-screen/component.tsx
@@ -42,6 +42,7 @@ function UnconnectedNavigatorScreen(
 	forwardedRef: ForwardedRef< any >
 ) {
 	const screenId = useId();
+	const animationTimeoutRef = useRef< number >();
 
 	// Read props and components context.
 	const { children, className, path, ...otherProps } = useContextSystem(
@@ -131,6 +132,19 @@ function UnconnectedNavigatorScreen(
 			isAnimatingOut,
 		]
 	);
+	// Fallback timeout to ensure the screen is removed from the DOM in case the
+	// `animationend` event is not triggered.
+	useEffect( () => {
+		if ( exitAnimationStatus === 'animating' ) {
+			animationTimeoutRef.current = window.setTimeout( () => {
+				setExitAnimationStatus( 'animated' );
+				animationTimeoutRef.current = undefined;
+			}, styles.TOTAL_ANIMATION_DURATION_OUT );
+		} else if ( animationTimeoutRef.current ) {
+			window.clearTimeout( animationTimeoutRef.current );
+			animationTimeoutRef.current = undefined;
+		}
+	}, [ exitAnimationStatus ] );
 
 	// Focus restoration
 	const locationRef = useRef( location );
diff --git a/packages/components/src/navigator/styles.ts b/packages/components/src/navigator/styles.ts
index 648c4f38a0b67..679b43138ead1 100644
--- a/packages/components/src/navigator/styles.ts
+++ b/packages/components/src/navigator/styles.ts
@@ -57,37 +57,42 @@ type NavigatorScreenAnimationProps = {
 };
 
 const FADE = {
-	DURATION: '70ms',
+	DURATION: 70,
 	EASING: 'linear',
 	DELAY: {
-		IN: '70ms',
-		OUT: '40ms',
+		IN: 70,
+		OUT: 40,
 	},
 };
 const SLIDE = {
-	DURATION: '300ms',
+	DURATION: 300,
 	EASING: 'cubic-bezier(0.33, 0, 0, 1)',
 };
 
+export const TOTAL_ANIMATION_DURATION_OUT = Math.max(
+	FADE.DURATION + FADE.DELAY.OUT,
+	SLIDE.DURATION
+);
+
 const ANIMATION = {
 	forwards: {
 		in: css`
-			${ FADE.DURATION } ${ FADE.EASING } ${ FADE.DELAY
-				.IN } both ${ fadeIn }, ${ SLIDE.DURATION } ${ SLIDE.EASING } both ${ slideFromRight }
+			${ FADE.DURATION }ms ${ FADE.EASING } ${ FADE.DELAY
+				.IN }ms both ${ fadeIn }, ${ SLIDE.DURATION }ms ${ SLIDE.EASING } both ${ slideFromRight }
 		`,
 		out: css`
-			${ FADE.DURATION } ${ FADE.EASING } ${ FADE.DELAY
-				.IN } both ${ fadeOut }, ${ SLIDE.DURATION } ${ SLIDE.EASING } both ${ slideToLeft }
+			${ FADE.DURATION }ms ${ FADE.EASING } ${ FADE.DELAY
+				.IN }ms both ${ fadeOut }, ${ SLIDE.DURATION }ms ${ SLIDE.EASING } both ${ slideToLeft }
 		`,
 	},
 	backwards: {
 		in: css`
-			${ FADE.DURATION } ${ FADE.EASING } ${ FADE.DELAY
-				.IN } both ${ fadeIn }, ${ SLIDE.DURATION } ${ SLIDE.EASING } both ${ slideFromLeft }
+			${ FADE.DURATION }ms ${ FADE.EASING } ${ FADE.DELAY
+				.IN }ms both ${ fadeIn }, ${ SLIDE.DURATION }ms ${ SLIDE.EASING } both ${ slideFromLeft }
 		`,
 		out: css`
-			${ FADE.DURATION } ${ FADE.EASING } ${ FADE.DELAY
-				.OUT } both ${ fadeOut }, ${ SLIDE.DURATION } ${ SLIDE.EASING } both ${ slideToRight }
+			${ FADE.DURATION }ms ${ FADE.EASING } ${ FADE.DELAY
+				.OUT }ms both ${ fadeOut }, ${ SLIDE.DURATION }ms ${ SLIDE.EASING } both ${ slideToRight }
 		`,
 	},
 };