diff --git a/wp-content/themes/twentytwentyone/inc/template-tags.php b/wp-content/themes/twentytwentyone/inc/template-tags.php
index faa7e495da..38add801c5 100644
--- a/wp-content/themes/twentytwentyone/inc/template-tags.php
+++ b/wp-content/themes/twentytwentyone/inc/template-tags.php
@@ -190,8 +190,8 @@ if ( ! function_exists( 'twenty_twenty_one_post_thumbnail' ) ) {
 
 			<figure class="post-thumbnail">
 				<?php
-				// Thumbnail is loaded eagerly because it's going to be in the viewport immediately.
-				the_post_thumbnail( 'post-thumbnail', array( 'loading' => 'eager' ) );
+				// Lazy-loading attributes should be skipped for thumbnails since they are immediately in the viewport.
+				the_post_thumbnail( 'post-thumbnail', array( 'loading' => false ) );
 				?>
 				<?php if ( wp_get_attachment_caption( get_post_thumbnail_id() ) ) : ?>
 					<figcaption class="wp-caption-text"><?php echo wp_kses_post( wp_get_attachment_caption( get_post_thumbnail_id() ) ); ?></figcaption>
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e6be5cc7c1..4f4d2bed01 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49859';
+$wp_version = '5.7-alpha-49860';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.