Fix mistake

src/Routing/RequestActionTrait.php

@@ -112,7 +112,7 @@ trait RequestActionTrait
         if ($isReturn !== false) {
             $extra['return'] = 0;
             $extra['autoRender'] = 1;
-            unset($extra[$index]);
+            unset($extra[$isReturn]);
         }
         $extra += ['autoRender' => 0, 'return' => 1, 'bare' => 1, 'requested' => 1];