From 7b6ac8d5a2c2ae3de969c09b9bbba707bdb8956e Mon Sep 17 00:00:00 2001
From: George Mamadashvili <georgemamadashvili@gmail.com>
Date: Mon, 25 Mar 2024 11:35:13 +0400
Subject: [PATCH] Navigation: Avoid content loss when only specific entity
 fields are edited (#60071)

Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: jsnajdr <jsnajdr@git.wordpress.org>
Co-authored-by: annezazu <annezazu@git.wordpress.org>
---
 packages/block-library/src/navigation/index.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/packages/block-library/src/navigation/index.php b/packages/block-library/src/navigation/index.php
index 1f623f4a158c59..49c4c67969191d 100644
--- a/packages/block-library/src/navigation/index.php
+++ b/packages/block-library/src/navigation/index.php
@@ -1520,6 +1520,14 @@ function block_core_navigation_update_ignore_hooked_blocks_meta( $post ) {
 		return $post;
 	}
 
+	/**
+	 * Skip meta generation when consumers intentionally update specific Navigation fields
+	 * and omit the content update.
+	 */
+	if ( ! isset( $post->post_content ) ) {
+		return $post;
+	}
+
 	/*
 	 * We run the Block Hooks mechanism to inject the `metadata.ignoredHookedBlocks` attribute into
 	 * all anchor blocks. For the root level, we create a mock Navigation and extract them from there.