diff --git a/packages/components/input/src/utils.ts b/packages/components/input/src/utils.ts
index 5b8fa3af02..a82a6164ba 100644
--- a/packages/components/input/src/utils.ts
+++ b/packages/components/input/src/utils.ts
@@ -76,7 +76,12 @@ export function calcTextareaHeight(
 ): TextAreaHeight {
   if (!hiddenTextarea) {
     hiddenTextarea = document.createElement('textarea')
-    ;(targetElement.parentNode ?? document.body).appendChild(hiddenTextarea)
+    let hostNode = document.body
+    // #23575
+    if (!isFirefox() && targetElement.parentNode) {
+      hostNode = targetElement.parentNode as HTMLElement
+    }
+    hostNode.appendChild(hiddenTextarea)
   }
 
   const { paddingSize, borderSize, boxSizing, contextStyle } =