diff --git a/wp-includes/html-api/class-wp-html-tag-processor.php b/wp-includes/html-api/class-wp-html-tag-processor.php
index 039a8f275b..8c41e73215 100644
--- a/wp-includes/html-api/class-wp-html-tag-processor.php
+++ b/wp-includes/html-api/class-wp-html-tag-processor.php
@@ -2142,6 +2142,8 @@ class WP_HTML_Tag_Processor {
 		 * to the end of the updated document and return.
 		 */
 		if ( $requires_no_updating && $this->bytes_already_copied > 0 ) {
+			$this->html                 = $this->output_buffer . substr( $this->html, $this->bytes_already_copied );
+			$this->bytes_already_copied = strlen( $this->output_buffer );
 			return $this->output_buffer . substr( $this->html, $this->bytes_already_copied );
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 747e8c2ada..4bd41c3146 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55674';
+$wp_version = '6.3-alpha-55675';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.