Merge branch '4.x' of https://github.com/craftcms/cms into 5.x

Author: brandonkelly

src/base/Element.php

@@ -1289,8 +1289,8 @@ public static function indexHtml(
             }
         }
 
-        // Only cache if there's no search term
-        if (!$elementQuery->search) {
+        // Only cache if there's no search term or relation param
+        if (!$elementQuery->search && !$elementQuery->relatedTo) {
             $elementQuery->cache();
         }