Issue #3324145 by robphillips: Strip HTML tags from labels.

entity_label.module

@@ -109,7 +109,7 @@ function entity_label_render(EntityInterface $entity, string $type = 'singular')
     /** @var \Drupal\Core\Config\Entity\ConfigEntityBundleBase $bundle */
     $bundle = \Drupal::entityTypeManager()->getStorage($entityTypeId)->load($entity->bundle());
     $settings = $bundle->getThirdPartySettings('entity_label');
-    $cache[$key] = $settings["label_$type"] ?? NULL;
+    $cache[$key] = $settings["label_$type"] ? strip_tags($settings["label_$type"]) : NULL;
     return $cache[$key];
   }
   return NULL;