diff --git a/wp-includes/post.php b/wp-includes/post.php
index 92d16a6290..9c41c2ae5e 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -4091,7 +4091,7 @@ function wp_insert_post( $postarr, $wp_error = false, $fire_after_hooks = true )
 			if ( ! empty( $tax_object->default_term ) ) {
 
 				// Filter out empty terms.
-				if ( isset( $postarr['tax_input'] ) && is_array( $postarr['tax_input'][ $taxonomy ] ) ) {
+				if ( isset( $postarr['tax_input'][ $taxonomy ] ) && is_array( $postarr['tax_input'][ $taxonomy ] ) ) {
 					$postarr['tax_input'][ $taxonomy ] = array_filter( $postarr['tax_input'][ $taxonomy ] );
 				}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a1aac4c24f..53464904b5 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-beta1-49327';
+$wp_version = '5.6-beta1-49328';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.