diff --git a/src/calculateNodeHeight.ts b/src/calculateNodeHeight.ts
index 418d3f07..26ac511c 100644
--- a/src/calculateNodeHeight.ts
+++ b/src/calculateNodeHeight.ts
@@ -33,7 +33,7 @@ export default function calculateNodeHeight(
     forceHiddenStyles(hiddenTextarea);
   }
 
-  if (hiddenTextarea.parentNode === null) {
+  if (!document.body.contains(hiddenTextarea)) {
     document.body.appendChild(hiddenTextarea);
   }