Hey there ​@Triet, Emily here from Support Engineering at Intercom

The issue with the chat not appearing on mobile devices in browsers other than Safari could be related to JavaScript blockers or browser extensions that block tracking functionality. These tools can prevent the Intercom Messenger from appearing because they block tracking functionality, which is a part of Intercom's services.

To resolve this, you can ask users to disable any JavaScript blockers or whitelist your site in their ad-blocking extensions.

If the issue persists, checking the browser console for errors when the chat is supposed to appear can provide further insights into what might be going wrong. You can access the console on mobile devices through the browser's developer tools, and look for errors in red after clearing the console and replicating the issue.

Hope this helps!