diff --git a/wp-includes/blocks/cover.php b/wp-includes/blocks/cover.php
index fc1aed7b96..9e14791ba8 100644
--- a/wp-includes/blocks/cover.php
+++ b/wp-includes/blocks/cover.php
@@ -32,12 +32,15 @@ function render_block_core_cover( $attributes, $content ) {
 
 		$image = get_the_post_thumbnail( null, 'post-thumbnail', $attr );
 
-		$content = str_replace(
-			'</span><div',
-			'</span>' . $image . '<div',
-			$content
-		);
-
+		/*
+		 * Inserts the featured image between the (1st) cover 'background' `span` and 'inner_container' `div`,
+		 * and removes eventual withespace characters between the two (typically introduced at template level)
+		 */
+		$inner_container_start = '/<div\b[^>]+wp-block-cover__inner-container[\s|"][^>]*>/U';
+		if ( 1 === preg_match( $inner_container_start, $content, $matches, PREG_OFFSET_CAPTURE ) ) {
+			$offset  = $matches[0][1];
+			$content = substr( $content, 0, $offset ) . $image . substr( $content, $offset );
+		}
 	} else {
 		if ( in_the_loop() ) {
 			update_post_thumbnail_cache();
diff --git a/wp-includes/class-wp-oembed.php b/wp-includes/class-wp-oembed.php
index 321f25c40f..4e83bc75da 100644
--- a/wp-includes/class-wp-oembed.php
+++ b/wp-includes/class-wp-oembed.php
@@ -202,8 +202,8 @@ class WP_oEmbed {
 		 * | Instagram TV | instagram.com        | 5.1.0     | 5.5.2     |
 		 * | Instagram TV | instagr.am           | 5.1.0     | 5.5.2     |
 		 * | Facebook     | facebook.com         | 4.7.0     | 5.5.2     |
-		 * | Meetup.com   | meetup.com           | 3.9.0     | 6.1.0     |
-		 * | Meetup.com   | meetu.ps             | 3.9.0     | 6.1.0     |
+		 * | Meetup.com   | meetup.com           | 3.9.0     | 6.0.1     |
+		 * | Meetup.com   | meetu.ps             | 3.9.0     | 6.0.1     |
 		 *
 		 * @see wp_oembed_add_provider()
 		 *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 33c629da43..8da33a154d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53644';
+$wp_version = '6.1-alpha-53646';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.