diff --git a/lib/compat/wordpress-6.8/blocks.php b/lib/compat/wordpress-6.8/blocks.php
index d1905c459d7531..742f9d609d039e 100644
--- a/lib/compat/wordpress-6.8/blocks.php
+++ b/lib/compat/wordpress-6.8/blocks.php
@@ -116,18 +116,18 @@ function gutenberg_stabilize_experimental_block_supports( $args ) {
 				( $key_positions[ $support ] ?? PHP_INT_MAX ) <
 				( $key_positions[ $stable_support_key ] ?? PHP_INT_MAX );
 
-				if ( is_array( $args['supports'][ $stable_support_key ] ) ) {
-					/*
-					 * To merge the alternative support config effectively, it also needs to be
-					 * stabilized before merging to keep stabilized and experimental flags in
-					 * sync.
-					 */
-					$args['supports'][ $stable_support_key ] = $stabilize_config( $args['supports'][ $stable_support_key ], $stable_support_key );
-					$stable_config                           = $experimental_first
-						? array_merge( $stable_config, $args['supports'][ $stable_support_key ] )
-						: array_merge( $args['supports'][ $stable_support_key ], $stable_config );
-					// Prevents reprocessing this support as it was merged above.
-					$done[ $stable_support_key ] = true;
+			if ( is_array( $args['supports'][ $stable_support_key ] ) ) {
+				/*
+					* To merge the alternative support config effectively, it also needs to be
+					* stabilized before merging to keep stabilized and experimental flags in
+					* sync.
+					*/
+				$args['supports'][ $stable_support_key ] = $stabilize_config( $args['supports'][ $stable_support_key ], $stable_support_key );
+				$stable_config                           = $experimental_first
+					? array_merge( $stable_config, $args['supports'][ $stable_support_key ] )
+					: array_merge( $args['supports'][ $stable_support_key ], $stable_config );
+				// Prevents reprocessing this support as it was merged above.
+				$done[ $stable_support_key ] = true;
 			} else {
 				$stable_config = $experimental_first
 					? $args['supports'][ $stable_support_key ]