diff --git a/modules/cart/src/Form/AddToCartForm.php b/modules/cart/src/Form/AddToCartForm.php
index d44c131..d811386
--- a/modules/cart/src/Form/AddToCartForm.php
+++ b/modules/cart/src/Form/AddToCartForm.php
@@ -144,7 +144,7 @@ class AddToCartForm extends ContentEntityForm {
     if ($this->operation != 'default') {
       $form_id = $form_id . '_' . $this->operation;
     }
-    $form_id .= '_' . self::$formInstanceId;
+    $form_id .= '_'.$this->entity->getPurchasedEntity()->bundle().'_' . $this->entity->getPurchasedEntity()->id();
 
     return $form_id . '_form';
   }