diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 097f8186e9..20c4d4da42 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -2647,6 +2647,13 @@ function wp_count_posts( $type = 'post', $perm = '' ) {
 
 	$counts = wp_cache_get( $cache_key, 'counts' );
 	if ( false !== $counts ) {
+		// We may have cached this before every status was registered.
+		foreach ( get_post_stati() as $status ) {
+			if ( ! isset( $counts->{$status} ) ) {
+				$counts->{$status} = 0;
+			}
+		}
+
 		/** This filter is documented in wp-includes/post.php */
 		return apply_filters( 'wp_count_posts', $counts, $type, $perm );
 	}
diff --git a/tests/phpunit/tests/post.php b/tests/phpunit/tests/post.php
index ca18c41b0e..14cfb31d16 100644
--- a/tests/phpunit/tests/post.php
+++ b/tests/phpunit/tests/post.php
@@ -879,6 +879,22 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertNotEquals( $initial_counts->publish, $after_trash_counts->publish );
 	}
 
+	/**
+	 * @ticket 49685
+	 */
+	function test_wp_count_posts_status_changes_visible() {
+		self::factory()->post->create_many( 3 );
+
+		// Trigger a cache.
+		wp_count_posts();
+
+		register_post_status( 'test' );
+
+		$counts = wp_count_posts();
+		$this->assertTrue( isset( $counts->test ) );
+		$this->assertEquals( 0, $counts->test );
+	}
+
 	/**
 	 * @ticket 13771
 	 */