diff --git src/wp-includes/query.php src/wp-includes/query.php
index 5a6a6eb..a2b2365 100644
--- src/wp-includes/query.php
+++ src/wp-includes/query.php
@@ -1811,7 +1811,7 @@ class WP_Query {
 		if ( $this->is_feed && ( !empty($qv['withcomments']) || ( empty($qv['withoutcomments']) && $this->is_singular ) ) )
 			$this->is_comment_feed = true;
 
-		if ( !( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_comments_popup || $this->is_robots ) )
+		if ( !( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_comments_popup || $this->is_robots ) )
 			$this->is_home = true;
 
 		// Correct is_* for page_on_front and page_for_posts