diff --git a/src/wp-includes/html-api/class-wp-html-tag-processor.php b/src/wp-includes/html-api/class-wp-html-tag-processor.php
index 039a8f275b..8c41e73215 100644
--- a/src/wp-includes/html-api/class-wp-html-tag-processor.php
+++ b/src/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/tests/phpunit/tests/html-api/wpHtmlTagProcessor.php b/tests/phpunit/tests/html-api/wpHtmlTagProcessor.php
index 86d6153957..15123748ae 100644
--- a/tests/phpunit/tests/html-api/wpHtmlTagProcessor.php
+++ b/tests/phpunit/tests/html-api/wpHtmlTagProcessor.php
@@ -456,6 +456,26 @@ class Tests_HtmlApi_wpHtmlTagProcessor extends WP_UnitTestCase {
 		);
 	}
 
+	/**
+	 * Ensures that when seeking to an earlier spot in the document that
+	 * all previously-enqueued updates are applied as they ought to be.
+	 *
+	 * @ticket 58160
+	 */
+	public function test_get_updated_html_applies_updates_to_content_after_seeking_to_before_parsed_bytes() {
+		$p = new WP_HTML_Tag_Processor( '<div><img hidden></div>' );
+
+		$p->next_tag();
+		$p->set_attribute( 'wonky', true );
+		$p->next_tag();
+		$p->set_bookmark( 'here' );
+
+		$p->next_tag( array( 'tag_closers' => 'visit' ) );
+		$p->seek( 'here' );
+
+		$this->assertSame( '<div wonky><img hidden></div>', $p->get_updated_html() );
+	}
+
 	/**
 	 * @ticket 56299
 	 *