From b973fed06be83645e2a111189787b839537fbd78 Mon Sep 17 00:00:00 2001
From: Vanessa <lly219@gmail.com>
Date: Sat, 10 Jan 2026 10:26:13 +0800
Subject: [PATCH] :bug: https://github.com/siyuan-note/siyuan/issues/16801

---
 app/src/protyle/wysiwyg/transaction.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/protyle/wysiwyg/transaction.ts b/app/src/protyle/wysiwyg/transaction.ts
index f045f89cd..909bc35c9 100644
--- a/app/src/protyle/wysiwyg/transaction.ts
+++ b/app/src/protyle/wysiwyg/transaction.ts
@@ -692,7 +692,7 @@ export const onTransaction = (protyle: IProtyle, operation: IOperation, isUndo:
                 if (getContenteditableElement(rangeBlockElement)) {
                     range.insertNode(document.createElement("wbr"));
                 } else {
-                    getContenteditableElement(updateElements[0]).insertAdjacentHTML("afterbegin", "<wbr>");
+                    getContenteditableElement(updateElements[0])?.insertAdjacentHTML("afterbegin", "<wbr>");
                 }
             }
         }