diff --git a/models/monitor.php b/models/monitor.php
index 17768ddf..8b1d577e 100644
--- a/models/monitor.php
+++ b/models/monitor.php
@@ -34,7 +34,7 @@ public function __construct( array $options ) {
 			// Only monitor if permalinks enabled
 			if ( get_option( 'permalink_structure' ) !== false ) {
 				add_action( 'pre_post_update', array( $this, 'pre_post_update' ), 10, 2 );
-				add_action( 'post_updated', array( $this, 'post_updated' ), 11, 3 );
+				add_action( 'wp_after_insert_post', array( $this, 'post_after_insert' ), 11, 4 );
 				add_action( 'redirection_remove_existing', array( $this, 'remove_existing_redirect' ) );
 				add_filter( 'redirection_permalink_changed', array( $this, 'has_permalink_changed' ), 10, 3 );
 
@@ -83,6 +83,27 @@ public function can_monitor_post( ?WP_Post $post, ?WP_Post $post_before ): bool
 		return true;
 	}
 
+	/**
+	 * Called after a post and its terms have been inserted or updated. This hook
+	 * fires after term assignment in both the classic editor and the REST/block
+	 * editor flows, so the new permalink is always available when we compare it
+	 * against the one captured in `pre_post_update`.
+	 *
+	 * @param int $post_id
+	 * @param WP_Post|null $post
+	 * @param bool $update
+	 * @param WP_Post|null $post_before
+	 * @return void
+	 */
+	public function post_after_insert( int $post_id, ?WP_Post $post, bool $update, ?WP_Post $post_before ): void {
+		// A slug cannot change on insertion, so skip brand-new posts.
+		if ( ! $update ) {
+			return;
+		}
+
+		$this->post_updated( $post_id, $post, $post_before );
+	}
+
 	/**
 	 * Called when a post has been updated - check if the slug has changed
 	 *
diff --git a/tests/integration/models/test-monitor.php b/tests/integration/models/test-monitor.php
index 5decd3cf..989c7572 100644
--- a/tests/integration/models/test-monitor.php
+++ b/tests/integration/models/test-monitor.php
@@ -228,7 +228,7 @@ public function testPostUpdatedWithNullPostExitsCleanly() {
 	public function testNoHooks() {
 		$monitor = new Red_Monitor( array( 'monitor_post' => 0, 'monitor_types' => array() ) );
 
-		$this->assertFalse( has_action( 'post_updated', array( $monitor, 'post_updated' ) ) );
+		$this->assertFalse( has_action( 'wp_after_insert_post', array( $monitor, 'post_after_insert' ) ) );
 		$this->assertFalse( has_action( 'edit_form_advanced', array( $monitor, 'insert_old_post' ) ) );
 		$this->assertFalse( has_action( 'edit_page_form', array( $monitor, 'insert_old_post' ) ) );
 	}
@@ -236,7 +236,7 @@ public function testNoHooks() {
 	public function testHasHooks() {
 		$monitor = new Red_Monitor( $this->getActiveOptions() );
 
-		$this->assertEquals( 11, has_action( 'post_updated', array( $monitor, 'post_updated' ) ) );
+		$this->assertEquals( 11, has_action( 'wp_after_insert_post', array( $monitor, 'post_after_insert' ) ) );
 		$this->assertEquals( 10, has_action( 'pre_post_update', array( $monitor, 'pre_post_update' ) ) );
 	}