diff --git a/src/Bundle/ChillActivityBundle/Entity/ActivityType.php b/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
index d27fc1784..ec1012136 100644
--- a/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
+++ b/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
@@ -11,6 +11,7 @@ declare(strict_types=1);
 
 namespace Chill\ActivityBundle\Entity;
 
+use Doctrine\Common\Util\ClassUtils;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Serializer\Annotation as Serializer;
 use Symfony\Component\Serializer\Annotation\Groups;
@@ -461,11 +462,13 @@ class ActivityType
     {
         $property = $field.'Visible';
 
-        if (!property_exists($this, $property)) {
+        // Get the real class name (not the proxy)
+        $realClass = ClassUtils::getClass($this);
+
+        if (!property_exists($realClass, $property)) {
             throw new \InvalidArgumentException('Field "'.$field.'" not found');
         }
 
-        /* @phpstan-ignore-next-line */
         return self::FIELD_INVISIBLE !== $this->{$property};
     }
 
diff --git a/src/Bundle/ChillMainBundle/Templating/TranslatableStringTwig.php b/src/Bundle/ChillMainBundle/Templating/TranslatableStringTwig.php
index c6bbc11ea..a9b551b81 100644
--- a/src/Bundle/ChillMainBundle/Templating/TranslatableStringTwig.php
+++ b/src/Bundle/ChillMainBundle/Templating/TranslatableStringTwig.php
@@ -42,10 +42,8 @@ class TranslatableStringTwig extends AbstractExtension
 
     /**
      * Returns the name of the extension.
-     *
-     * @return The name of the extension
      */
-    public function getName()
+    public function getName(): string
     {
         return 'chill_main_localize';
     }