diff --git a/app/src/protyle/wysiwyg/transaction.ts b/app/src/protyle/wysiwyg/transaction.ts
index 164523062..a4fc65622 100644
--- a/app/src/protyle/wysiwyg/transaction.ts
+++ b/app/src/protyle/wysiwyg/transaction.ts
@@ -1023,7 +1023,7 @@ export const turnsIntoTransaction = (options: {
     range?: Range
 }) => {
     // https://github.com/siyuan-note/siyuan/issues/14505
-    options.protyle.observerLoad.disconnect();
+    options.protyle.observerLoad?.disconnect();
     let selectsElement: Element[] = options.selectsElement;
     let range: Range;
     // 通过快捷键触发