diff --git a/packages/block-library/src/navigation/edit/index.js b/packages/block-library/src/navigation/edit/index.js
index b95ad49d2d9b6..751d33b9b501f 100644
--- a/packages/block-library/src/navigation/edit/index.js
+++ b/packages/block-library/src/navigation/edit/index.js
@@ -92,7 +92,7 @@ function Navigation( {
 			flexWrap = 'wrap',
 		} = {},
 		hasIcon,
-		icon,
+		icon = 'handle',
 	} = attributes;
 
 	const ref = attributes.ref;
diff --git a/packages/block-library/src/navigation/edit/overlay-menu-icon.js b/packages/block-library/src/navigation/edit/overlay-menu-icon.js
index 655094532840e..4db5f2d9faa09 100644
--- a/packages/block-library/src/navigation/edit/overlay-menu-icon.js
+++ b/packages/block-library/src/navigation/edit/overlay-menu-icon.js
@@ -5,21 +5,7 @@ import { SVG, Rect } from '@wordpress/primitives';
 import { Icon, menu, moreVertical, moreHorizontal } from '@wordpress/icons';
 
 export default function OverlayMenuIcon( { icon } ) {
-	if ( icon === 'handle' ) {
-		return (
-			<SVG
-				xmlns="http://www.w3.org/2000/svg"
-				viewBox="0 0 24 24"
-				width="24"
-				height="24"
-				aria-hidden="true"
-				focusable="false"
-			>
-				<Rect x="4" y="7.5" width="16" height="1.5" />
-				<Rect x="4" y="15" width="16" height="1.5" />
-			</SVG>
-		);
-	} else if ( icon === 'menu' ) {
+	if ( icon === 'menu' ) {
 		return <Icon icon={ menu } />;
 	} else if ( icon === 'more-vertical' ) {
 		return <Icon icon={ moreVertical } />;
@@ -27,5 +13,17 @@ export default function OverlayMenuIcon( { icon } ) {
 		return <Icon icon={ moreHorizontal } />;
 	}
 
-	return null;
+	return (
+		<SVG
+			xmlns="http://www.w3.org/2000/svg"
+			viewBox="0 0 24 24"
+			width="24"
+			height="24"
+			aria-hidden="true"
+			focusable="false"
+		>
+			<Rect x="4" y="7.5" width="16" height="1.5" />
+			<Rect x="4" y="15" width="16" height="1.5" />
+		</SVG>
+	);
 }
diff --git a/packages/block-library/src/navigation/index.php b/packages/block-library/src/navigation/index.php
index cb33dd4ba3bb4..f7f3f299cd875 100644
--- a/packages/block-library/src/navigation/index.php
+++ b/packages/block-library/src/navigation/index.php
@@ -611,12 +611,14 @@ function render_block_core_navigation( $attributes, $content, $block ) {
 
 	$should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon'];
 	$toggle_button_icon        = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><rect x="4" y="7.5" width="16" height="1.5" /><rect x="4" y="15" width="16" height="1.5" /></svg>';
-	if ( 'menu' === $attributes['icon'] ) {
-		$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5zm0 7.8h14v-1.5H5v1.5zM5 19h14v-1.5H5V19z" /></svg>';
-	} elseif ( 'more-vertical' === $attributes['icon'] ) {
-		$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13 19h-2v-2h2v2zm0-6h-2v-2h2v2zm0-6h-2V5h2v2z" /></svg>';
-	} elseif ( 'more-horizontal' === $attributes['icon'] ) {
-		$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M11 13h2v-2h-2v2zm-6 0h2v-2H5v2zm12-2v2h2v-2h-2z" /></svg>';
+	if ( isset( $attributes['icon'] ) ) {
+		if ( 'menu' === $attributes['icon'] ) {
+			$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5zm0 7.8h14v-1.5H5v1.5zM5 19h14v-1.5H5V19z" /></svg>';
+		} elseif ( 'more-vertical' === $attributes['icon'] ) {
+			$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13 19h-2v-2h2v2zm0-6h-2v-2h2v2zm0-6h-2V5h2v2z" /></svg>';
+		} elseif ( 'more-horizontal' === $attributes['icon'] ) {
+			$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M11 13h2v-2h-2v2zm-6 0h2v-2H5v2zm12-2v2h2v-2h-2z" /></svg>';
+		}
 	}
 	$toggle_button_content       = $should_display_icon_label ? $toggle_button_icon : __( 'Menu' );
 	$toggle_close_button_icon    = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M13 11.8l6.1-6.3-1-1-6.1 6.2-6.1-6.2-1 1 6.1 6.3-6.5 6.7 1 1 6.5-6.6 6.5 6.6 1-1z"></path></svg>';