diff --git src/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php src/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php
index 802d67e..11b5cd6 100644
--- src/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php
+++ src/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php
@@ -233,6 +233,9 @@ class WP_Customize_Nav_Menu_Item_Setting extends WP_Customize_Setting {
 			} else {
 				$value = $post_value;
 			}
+			if ( ! empty( $value ) && empty( $value['original_title'] ) ) {
+				$value['original_title'] = $this->get_original_title( (object) $value );
+			}
 		} elseif ( isset( $this->value ) ) {
 			$value = $this->value;
 		} else {
@@ -260,6 +263,10 @@ class WP_Customize_Nav_Menu_Item_Setting extends WP_Customize_Setting {
 			$value = $this->value;
 		}
 
+		if ( ! empty( $value ) && empty( $value['type_label'] ) ) {
+			$value['type_label'] = $this->get_type_label( (object) $value );
+		}
+
 		return $value;
 	}
 
@@ -273,11 +280,8 @@ class WP_Customize_Nav_Menu_Item_Setting extends WP_Customize_Setting {
 	 * @return string The original title.
 	 */
 	protected function get_original_title( $item ) {
-		if ( empty( $item->object_id ) ) {
-			return '';
-		}
 		$original_title = '';
-		if ( 'post_type' === $item->type ) {
+		if ( 'post_type' === $item->type && ! empty( $item->object_id ) ) {
 			$original_object = get_post( $item->object_id );
 			if ( $original_object ) {
 				/** This filter is documented in wp-includes/post-template.php */
@@ -288,17 +292,54 @@ class WP_Customize_Nav_Menu_Item_Setting extends WP_Customize_Setting {
 					$original_title = sprintf( __( '#%d (no title)' ), $original_object->ID );
 				}
 			}
-		} elseif ( 'taxonomy' === $item->type ) {
+		} elseif ( 'taxonomy' === $item->type && ! empty( $item->object_id ) ) {
 			$original_term_title = get_term_field( 'name', $item->object_id, $item->object, 'raw' );
 			if ( ! is_wp_error( $original_term_title ) ) {
 				$original_title = $original_term_title;
 			}
+		} elseif ( 'post_type_archive' === $item->type ) {
+			$original_object = get_post_type_object( $item->object );
+			if ( $original_object ) {
+				$original_title = $original_object->labels->archives;
+			}
 		}
 		$original_title = html_entity_decode( $original_title, ENT_QUOTES, get_bloginfo( 'charset' ) );
 		return $original_title;
 	}
 
 	/**
+	 * Get type label.
+	 *
+	 * @since 4.7.0
+	 * @access protected
+	 *
+	 * @param object $item Nav menu item.
+	 * @returns string The type label.
+	 */
+	protected function get_type_label( $item ) {
+		if ( 'post_type' === $item->type ) {
+			$object = get_post_type_object( $item->object );
+			if ( $object ) {
+				$type_label = $object->labels->singular_name;
+			} else {
+				$type_label = $item->object;
+			}
+		} elseif ( 'taxonomy' === $item->type ) {
+			$object = get_taxonomy( $item->object );
+			if ( $object ) {
+				$type_label = $object->labels->singular_name;
+			} else {
+				$type_label = $item->object;
+			}
+		} elseif ( 'post_type_archive' === $item->type ) {
+			$type_label = __( 'Post Type Archive' );
+		} else {
+			$type_label = __( 'Custom Link' );
+		}
+		return $type_label;
+	}
+
+	/**
 	 * Ensure that the value is fully populated with the necessary properties.
 	 *
 	 * Translates some properties added by wp_setup_nav_menu_item() and removes others.
@@ -584,23 +625,7 @@ class WP_Customize_Nav_Menu_Item_Setting extends WP_Customize_Setting {
 		}
 
 		if ( ! isset( $post->type_label ) ) {
-			if ( 'post_type' === $post->type ) {
-				$object = get_post_type_object( $post->object );
-				if ( $object ) {
-					$post->type_label = $object->labels->singular_name;
-				} else {
-					$post->type_label = $post->object;
-				}
-			} elseif ( 'taxonomy' === $post->type ) {
-				$object = get_taxonomy( $post->object );
-				if ( $object ) {
-					$post->type_label = $object->labels->singular_name;
-				} else {
-					$post->type_label = $post->object;
-				}
-			} else {
-				$post->type_label = __( 'Custom Link' );
-			}
+			$post->type_label = $this->get_type_label( $post );
 		}
 
 		// Ensure nav menu item URL is set according to linked object.
diff --git tests/phpunit/tests/customize/nav-menu-item-setting.php tests/phpunit/tests/customize/nav-menu-item-setting.php
index 45aefb9..bcb3dc5 100644
--- tests/phpunit/tests/customize/nav-menu-item-setting.php
+++ tests/phpunit/tests/customize/nav-menu-item-setting.php
@@ -811,8 +811,11 @@ class Test_WP_Customize_Nav_Menu_Item_Setting extends WP_UnitTestCase {
 
 		$setting->preview();
 
+		$item_value = $setting->value();
+		$this->assertArrayHasKey( 'type_label', $item_value );
 		$nav_menu_item = $setting->value_as_wp_post_nav_menu_item();
 		$this->assertEquals( 'Custom Link', $nav_menu_item->type_label );
+		$this->assertEquals( $item_value['type_label'], $nav_menu_item->type_label );
 		add_filter( 'wp_setup_nav_menu_item', array( $this, 'filter_type_label' ) );
 		$nav_menu_item = $setting->value_as_wp_post_nav_menu_item();
 		$this->assertEquals( 'Custom Label', $nav_menu_item->type_label );
@@ -895,6 +898,167 @@ class Test_WP_Customize_Nav_Menu_Item_Setting extends WP_UnitTestCase {
 	}
 
 	/**
+	 * Test WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item() for obtaining original title.
+	 *
+	 * @ticket 38945
+	 * @covers WP_Customize_Nav_Menu_Item_Setting::get_original_title()
+	 */
+	function test_get_original_title() {
+		$menu_id = wp_create_nav_menu( 'Menu' );
+		register_post_type( 'press_release', array(
+			'has_archive' => true,
+			'labels' => array(
+				'name' => 'PRs',
+				'singular_name' => 'PR',
+				'archives' => 'All PRs',
+			),
+		) );
+		$original_post_title = 'The PR Post';
+		$post_id = self::factory()->post->create( array( 'post_type' => 'press_release', 'post_title' => $original_post_title ) );
+		$original_term_title = 'The Category Term';
+		$term_id = self::factory()->term->create( array( 'taxonomy' => 'category', 'name' => $original_term_title ) );
+
+		// Post: existing nav menu item.
+		$nav_menu_item_id = wp_update_nav_menu_item( $menu_id, 0, array(
+			'menu-item-object-id' => $post_id,
+			'menu-item-type' => 'post_type',
+			'menu-item-object' => 'press_release',
+			'menu-item-title' => '',
+			'menu-item-status' => 'publish',
+		) );
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[' . $nav_menu_item_id . ']'
+		);
+		$item_value = $setting->value();
+		$this->assertEquals( $original_post_title, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( $original_post_title, $item->original_title );
+		$this->assertEquals( $original_post_title, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->singular_name, $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+
+		// Post: staged nav menu item.
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[-1]'
+		);
+		$this->wp_customize->set_post_value( $setting->id, array(
+			'object_id' => $post_id,
+			'type' => 'post_type',
+			'object' => 'press_release',
+			'title' => '',
+			'status' => 'publish',
+		) );
+		$setting->preview();
+		$item_value = $setting->value();
+		$this->assertEquals( $original_post_title, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( $original_post_title, $item->original_title );
+		$this->assertEquals( $original_post_title, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->singular_name, $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+
+		// Term: existing nav menu item.
+		$nav_menu_item_id = wp_update_nav_menu_item( $menu_id, 0, array(
+			'menu-item-object-id' => $term_id,
+			'menu-item-type' => 'taxonomy',
+			'menu-item-object' => 'category',
+			'menu-item-title' => '',
+			'menu-item-status' => 'publish',
+		) );
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[' . $nav_menu_item_id . ']'
+		);
+		$item_value = $setting->value();
+		$this->assertEquals( $original_term_title, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( $original_term_title, $item->original_title );
+		$this->assertEquals( $original_term_title, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( get_taxonomy( 'category' )->labels->singular_name, $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+
+		// Term: staged nav menu item.
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[-2]'
+		);
+		$this->wp_customize->set_post_value( $setting->id, array(
+			'object_id' => $term_id,
+			'type' => 'taxonomy',
+			'object' => 'category',
+			'title' => '',
+			'status' => 'publish',
+		) );
+		$setting->preview();
+		$item_value = $setting->value();
+		$this->assertEquals( $original_term_title, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( $original_term_title, $item->original_title );
+		$this->assertEquals( $original_term_title, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( get_taxonomy( 'category' )->labels->singular_name, $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+
+		// Post Type Archive: existing nav menu item.
+		$nav_menu_item_id = wp_update_nav_menu_item( $menu_id, 0, array(
+			'menu-item-type' => 'post_type_archive',
+			'menu-item-object' => 'press_release',
+			'menu-item-title' => '',
+			'menu-item-status' => 'publish',
+		) );
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[' . $nav_menu_item_id . ']'
+		);
+		$item_value = $setting->value();
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item->original_title );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( __( 'Post Type Archive' ), $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+
+		// Post Type Archive: staged nav menu item.
+		$setting = new WP_Customize_Nav_Menu_Item_Setting(
+			$this->wp_customize,
+			'nav_menu_item[-3]'
+		);
+		$this->wp_customize->set_post_value( $setting->id, array(
+			'type' => 'post_type_archive',
+			'object' => 'press_release',
+			'title' => '',
+			'status' => 'publish',
+		) );
+		$setting->preview();
+		$item_value = $setting->value();
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item_value['original_title'] );
+		$this->assertEquals( '', $item_value['title'] );
+		$item = $setting->value_as_wp_post_nav_menu_item();
+		$this->assertObjectHasAttribute( 'type_label', $item );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item->original_title );
+		$this->assertEquals( get_post_type_object( 'press_release' )->labels->archives, $item->title );
+		$this->assertArrayHasKey( 'type_label', $item_value );
+		$this->assertEquals( __( 'Post Type Archive' ), $item_value['type_label'] );
+		$this->assertEquals( $item->type_label, $item_value['type_label'] );
+	}
+
+	/**
 	 * Test WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item() where title is empty.
 	 *
 	 * @ticket 38015