diff --git a/app/src/mobile/util/closePanel.ts b/app/src/mobile/util/closePanel.ts
index 098d5cf03..109b14461 100644
--- a/app/src/mobile/util/closePanel.ts
+++ b/app/src/mobile/util/closePanel.ts
@@ -1,11 +1,14 @@
 import {activeBlur} from "./keyboardToolbar";
+import {Constants} from "../../constants";
 
 export const closePanel = () => {
     document.getElementById("menu").style.transform = "";
     document.getElementById("sidebar").style.transform = "";
     document.getElementById("model").style.transform = "";
     const maskElement = document.querySelector(".side-mask") as HTMLElement;
-    maskElement.classList.add("fn__none");
+    setTimeout(() => {
+        maskElement.classList.add("fn__none");
+    }, Constants.TIMEOUT_TRANSITION);
     maskElement.style.opacity = "";
     window.siyuan.menus.menu.remove();
 };