diff --git a/app/src/menus/protyle.ts b/app/src/menus/protyle.ts
index 93429d418..b317ee646 100644
--- a/app/src/menus/protyle.ts
+++ b/app/src/menus/protyle.ts
@@ -465,7 +465,7 @@ export const zoomOut = (protyle: IProtyle, id: string, focusId?: string, isPushB
         if (isPushBack) {
             pushBack();
         }
-    } else {
+    } else if (protyle.breadcrumb) {
         const exitFocusElement =  protyle.breadcrumb.element.parentElement.querySelector('[data-type="exit-focus"]');
         if (id === protyle.block.rootID) {
             exitFocusElement.classList.add("fn__none");
diff --git a/app/src/protyle/breadcrumb/index.ts b/app/src/protyle/breadcrumb/index.ts
index e503fa42b..ef80d9c2c 100644
--- a/app/src/protyle/breadcrumb/index.ts
+++ b/app/src/protyle/breadcrumb/index.ts
@@ -35,7 +35,7 @@ export class Breadcrumb {
     constructor(protyle: IProtyle) {
         const element = document.createElement("div");
         element.className = "protyle-breadcrumb";
-        const isFocus = protyle.options.action.includes(Constants.CB_GET_ALL);
+        const isFocus = protyle.options.action.includes(Constants.CB_GET_ALL) && !isMobile();
         let html = `<div class="protyle-breadcrumb__bar"></div>
 <span class="protyle-breadcrumb__space"></span>
 <button class="block__icon block__icon--show ft__smaller fn__flex-center${isFocus ? "" : " fn__none"}" style="line-height: 14px" data-type="exit-focus">${window.siyuan.languages.exitFocus}</button>