Add additional url argument to prevent caching

public/typo3conf/ext/ep_theme/Classes/ViewHelpers/Uri/AjaxViewHelper.php

@@ -79,6 +79,9 @@ class AjaxViewHelper extends ActionViewHelper
         // Force absolute urls
         $arguments['absolute'] = true;
 
+        // Add timestamp as additional argument to prevent caching
+        $arguments['additionalParams'] = ['t' => time()];
+
         return parent::renderStatic(
             $arguments,
             $renderChildrenClosure,