diff --git a/web/app/components/share/chat/index.tsx b/web/app/components/share/chat/index.tsx
index 31bc37766..23fc19936 100644
--- a/web/app/components/share/chat/index.tsx
+++ b/web/app/components/share/chat/index.tsx
@@ -570,8 +570,11 @@ const Main: FC<IMainProps> = ({
   if (appUnavailable)
     return <AppUnavailable isUnknwonReason={isUnknwonReason} />
 
-  if (!appId || !siteInfo || !promptConfig)
-    return <Loading type='app' />
+  if (!appId || !siteInfo || !promptConfig) {
+    return <div className='flex h-screen w-full'>
+      <Loading type='app' />
+    </div>
+  }
 
   return (
     <div className='bg-gray-100'>
@@ -611,7 +614,7 @@ const Main: FC<IMainProps> = ({
         )}
         {/* main */}
         <div className={cn(
-          isInstalledApp ? s.installedApp : 'h-screen',
+          isInstalledApp ? s.installedApp : 'h-[calc(100vh_-_3rem)] tablet:h-screen',
           'flex-grow flex flex-col overflow-y-auto',
         )
         }>
diff --git a/web/app/components/share/chatbot/index.tsx b/web/app/components/share/chatbot/index.tsx
index 5602294c4..a9c77402e 100644
--- a/web/app/components/share/chatbot/index.tsx
+++ b/web/app/components/share/chatbot/index.tsx
@@ -494,8 +494,11 @@ const Main: FC<IMainProps> = ({
   if (appUnavailable)
     return <AppUnavailable isUnknwonReason={isUnknwonReason} />
 
-  if (!appId || !siteInfo || !promptConfig)
-    return <Loading type='app' />
+  if (!appId || !siteInfo || !promptConfig) {
+    return <div className='flex h-screen w-full'>
+      <Loading type='app' />
+    </div>
+  }
 
   return (
     <div>