diff --git a/src/wp-includes/class-wp-theme-json.php b/src/wp-includes/class-wp-theme-json.php
index 6f068fa05524b..180cb43e8fc31 100644
--- a/src/wp-includes/class-wp-theme-json.php
+++ b/src/wp-includes/class-wp-theme-json.php
@@ -2915,13 +2915,8 @@ static function ( $pseudo_selector ) use ( $selector ) {
 			}
 		}
 
-		// 7. Generate and append any custom CSS rules pertaining to nested block style variations.
-		if ( isset( $node['css'] ) && ! $is_root_selector ) {
-			$block_rules .= $this->process_blocks_custom_css( $node['css'], $selector );
-		}
-
 		// 7. Generate and append any custom CSS rules.
-		if ( isset( $node['css'] ) ) {
+		if ( isset( $node['css'] ) && ! $is_root_selector ) {
 			$block_rules .= $this->process_blocks_custom_css( $node['css'], $selector );
 		}