diff --git a/app/src/protyle/wysiwyg/index.ts b/app/src/protyle/wysiwyg/index.ts
index ab3f9abba..da6eb6c62 100644
--- a/app/src/protyle/wysiwyg/index.ts
+++ b/app/src/protyle/wysiwyg/index.ts
@@ -176,6 +176,9 @@ export class WYSIWYG {
         if (inputData === "<" || inputData === ">") {
             // 使用 inlineElement.innerHTML 会出现 https://ld246.com/article/1627185027423 中的第2个问题
             dataLength = 4;
+        } else if (inputData === "&") {
+            // https://github.com/siyuan-note/siyuan/issues/12239
+            dataLength = 5;
         }
         // https://github.com/siyuan-note/siyuan/issues/5924
         if (currentTypes.length > 0 && range.toString() === "" && range.startOffset === inputData.length &&