diff --git a/connectors/class-connector-acf.php b/connectors/class-connector-acf.php
index 15ace08ff..29672792a 100644
--- a/connectors/class-connector-acf.php
+++ b/connectors/class-connector-acf.php
@@ -196,8 +196,8 @@ public function callback_post_updated( $post_id, $posts_after, $posts_before ) {
 			return;
 		}
 
-		$_new = maybe_unserialize( $posts_after->post_content ) ?? array();
-		$_old = maybe_unserialize( $posts_before->post_content ) ?? array();
+		$_new = ! empty( $posts_after->post_content ) ? maybe_unserialize( $posts_after->post_content ) : array();
+		$_old = ! empty( $posts_before->post_content ) ? maybe_unserialize( $posts_before->post_content ) : array();
 
 		// Get updated settings.
 		$updated_keys = $this->get_changed_keys( $_new, $_old );