Core/Entities/PropagateProperties.php

@@ -97,7 +97,7 @@ class PropagateProperties
  {
  $this->changed = false;
  $attachment = $this->entitiesBuilder->single($activity->get('entity_guid'));
- if ($attachment === false) {
+ if (empty($attachment)) {
  return;
  }
 

Core/Entities/Propagator/Properties.php

@@ -55,7 +55,15 @@ abstract class Properties
  }
 
  if ($this->actsOnType === [] || in_array($entity->getType(), $this->actsOnType, true)) {
- return $this->actsOnSubtype === [] || in_array($entity->getSubtype(), $this->actsOnSubtype, true);
+ if ($this->actsOnSubtype === []) {
+ return true;
+ }
+
+ if (!is_callable([$entity, 'getSubtype'], true)) {
+ return false;
+ }
+
+ return in_array($entity->getSubtype(), $this->actsOnSubtype, true);
  }
 
  return false;