diff --git a/app/src/protyle/util/insertHTML.ts b/app/src/protyle/util/insertHTML.ts
index 2c702542e..00b5d7e51 100644
--- a/app/src/protyle/util/insertHTML.ts
+++ b/app/src/protyle/util/insertHTML.ts
@@ -382,12 +382,14 @@ export const insertHTML = (html: string, protyle: IProtyle, isBlock = false,
         isBlock = false;
         block2text = true;
     }
-    // 通过右键粘贴包含属性的块需保留整个块 https://github.com/siyuan-note/siyuan/issues/15268
-    for (let i = 0; i < tempElement.content.firstElementChild.attributes.length; i++) {
-        const attribute = tempElement.content.firstElementChild.attributes[i];
-        if (["memo", "name", "alias", "bookmark"].includes(attribute.name) || attribute.name.startsWith("custom-")) {
-            isBlock = true;
-            break;
+    if (!isBlock && tempElement && tempElement.content.childElementCount === 1) {
+        // 通过右键粘贴包含属性的块需保留整个块 https://github.com/siyuan-note/siyuan/issues/15268
+        for (let i = 0; i < tempElement.content.firstElementChild.attributes.length; i++) {
+            const attribute = tempElement.content.firstElementChild.attributes[i];
+            if (["memo", "name", "alias", "bookmark"].includes(attribute.name) || attribute.name.startsWith("custom-")) {
+                isBlock = true;
+                break;
+            }
         }
     }
     // 使用 lute 方法会添加 p 元素，只有一个 p 元素或者只有一个字符串或者为 <u>b</u> 时的时候只拷贝内部