diff --git a/backport-changelog/6.8/7661.md b/backport-changelog/6.7/7661.md
similarity index 67%
rename from backport-changelog/6.8/7661.md
rename to backport-changelog/6.7/7661.md
index 2170f50c2a4e8..711d03595162c 100644
--- a/backport-changelog/6.8/7661.md
+++ b/backport-changelog/6.7/7661.md
@@ -1,3 +1,4 @@
 https://github.com/WordPress/wordpress-develop/pull/7661
 
 * https://github.com/WordPress/gutenberg/pull/66468
+* https://github.com/WordPress/gutenberg/pull/66543
diff --git a/lib/compat/wordpress-6.7/rest-api.php b/lib/compat/wordpress-6.7/rest-api.php
index 313367594caae..89efdc4c4219d 100644
--- a/lib/compat/wordpress-6.7/rest-api.php
+++ b/lib/compat/wordpress-6.7/rest-api.php
@@ -50,6 +50,25 @@ function gutenberg_block_editor_preload_paths_6_7( $paths, $context ) {
 		}
 	}
 
+	// Preload theme and global styles paths.
+	$excluded_paths = array();
+	if ( 'core/edit-site' === $context->name || 'core/edit-post' === $context->name ) {
+		$active_theme     = get_stylesheet();
+		$global_styles_id = WP_Theme_JSON_Resolver_Gutenberg::get_user_global_styles_post_id();
+		$paths[]          = '/wp/v2/global-styles/themes/' . $active_theme . '?context=view';
+		$paths[]          = '/wp/v2/global-styles/themes/' . $active_theme . '/variations?context=view';
+		$paths[]          = array( '/wp/v2/global-styles/' . $global_styles_id, 'OPTIONS' );
+
+		// Remove duplicate or unnecessary global styles paths.
+		$excluded_paths[] = '/wp/v2/global-styles/themes/' . $active_theme;
+		$excluded_paths[] = '/wp/v2/global-styles/' . $global_styles_id;
+		foreach ( $paths as $key => $path ) {
+			if ( in_array( $path, $excluded_paths, true ) ) {
+				unset( $paths[ $key ] );
+			}
+		}
+	}
+
 	return $paths;
 }
 add_filter( 'block_editor_rest_api_preload_paths', 'gutenberg_block_editor_preload_paths_6_7', 10, 2 );
diff --git a/lib/compat/wordpress-6.8/preload.php b/lib/compat/wordpress-6.8/preload.php
deleted file mode 100644
index 057cdc0965757..0000000000000
--- a/lib/compat/wordpress-6.8/preload.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-/**
- * Preload theme and global styles paths to avoid flash of variation styles in
- * post editor.
- *
- * @param array                   $paths REST API paths to preload.
- * @param WP_Block_Editor_Context $context Current block editor context.
- * @return array Filtered preload paths.
- */
-function gutenberg_block_editor_preload_paths_6_8( $paths, $context ) {
-	$excluded_paths = array();
-	if ( 'core/edit-site' === $context->name || 'core/edit-post' === $context->name ) {
-		$stylesheet       = get_stylesheet();
-		$global_styles_id = WP_Theme_JSON_Resolver_Gutenberg::get_user_global_styles_post_id();
-		$paths[]          = '/wp/v2/global-styles/themes/' . $stylesheet . '?context=view';
-		$paths[]          = '/wp/v2/global-styles/themes/' . $stylesheet . '/variations?context=view';
-		$paths[]          = array( '/wp/v2/global-styles/' . $global_styles_id, 'OPTIONS' );
-		$excluded_paths[] = '/wp/v2/global-styles/themes/' . $stylesheet;
-		$excluded_paths[] = '/wp/v2/global-styles/' . $global_styles_id;
-	}
-	foreach ( $paths as $key => $path ) {
-		if ( in_array( $path, $excluded_paths, true ) ) {
-			unset( $paths[ $key ] );
-		}
-	}
-	return $paths;
-}
-add_filter( 'block_editor_rest_api_preload_paths', 'gutenberg_block_editor_preload_paths_6_8', 10, 2 );
diff --git a/lib/load.php b/lib/load.php
index 574d901e72a69..2c8a0fd0347c9 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -47,7 +47,6 @@ function gutenberg_is_experiment_enabled( $name ) {
 	require __DIR__ . '/compat/wordpress-6.7/rest-api.php';
 
 	// WordPress 6.8 compat.
-	require __DIR__ . '/compat/wordpress-6.8/preload.php';
 	require __DIR__ . '/compat/wordpress-6.8/block-comments.php';
 	require __DIR__ . '/compat/wordpress-6.8/class-gutenberg-rest-comment-controller-6-8.php';