diff --git a/src/wp-includes/collaboration/class-wp-http-polling-sync-server.php b/src/wp-includes/collaboration/class-wp-http-polling-sync-server.php
index bc9d208f096be..7f60a3075add1 100644
--- a/src/wp-includes/collaboration/class-wp-http-polling-sync-server.php
+++ b/src/wp-includes/collaboration/class-wp-http-polling-sync-server.php
@@ -278,6 +278,11 @@ private function can_user_sync_entity_type( string $entity_kind, string $entity_
 			return isset( $taxonomy->cap->assign_terms ) && current_user_can( $taxonomy->cap->assign_terms );
 		}
 
+		// Handle single comment entities with a defined object ID.
+		if ( 'root' === $entity_kind && 'comment' === $entity_name && is_numeric( $object_id ) ) {
+			return current_user_can( 'edit_comment', (int) $object_id );
+		}
+
 		// All the remaining checks are for collections. If an object ID is provided,
 		// reject the request.
 		if ( null !== $object_id ) {