diff --git a/src/Context/FieldResolver.php b/src/Context/FieldResolver.php
index 77150a8..202f77e 100644
--- a/src/Context/FieldResolver.php
+++ b/src/Context/FieldResolver.php
@@ -337,6 +337,13 @@ class FieldResolver {
         return $this->constructInternalPath($reference_breadcrumbs);
       }
 
+      // JSON:API outputs entity reference field properties under a meta object
+      // on a relationship. If the filter specifies one of these properties, it
+      // must prefix the property name with `meta`. The only exception is if the
+      // next path part is the same as the name for the reference property
+      // (typically `entity`), this is permitted to disambiguate the case of a
+      // field name on the target entity which is the same a property name on
+      // the entity reference field.
       if ($at_least_one_entity_reference_field && $parts[0] !== 'id') {
         if ($parts[0] === 'meta') {
           array_shift($parts);