Adjust detecting whether a passed component is deferred

Author: jakubtobiasz

src/LiveComponent/src/EventListener/AddLiveAttributesSubscriber.php

@@ -74,14 +74,10 @@ public function onPreRender(PreRenderEvent $event): void
                 );
             }
 
-            $hasLiveId = isset($originalAttributes['data-live-id']);
-            $isDeferred = \array_key_exists('defer', $originalAttributes);
-            $loadingTemplate = $originalAttributes['defer-loading-template'] ?? null;
-
-            // if the original attributes has a data-live-id, it means the component
-            // was already rendered
-            if (!$hasLiveId && $isDeferred) {
-                $attributes = $attributes->without('defer', 'defer-loading-template');
+            $inputProps = $event->getMountedComponent()->getInputProps();
+            $isDeferred = array_key_exists('defer', $inputProps);
+
+            if ($isDeferred) {
                 $event->setTemplate('@LiveComponent/deferred.html.twig');
 
                 if ($loadingTemplate) {