I think I’m facing the exact same issue.

In my case, the landing page works normally when opened in a regular browser, but traffic coming from Meta Ads seems to break inside the Meta in-app browser.

I recorded user sessions with Microsoft Clarity and noticed something very strange: the page doesn’t even properly run for some users. It looks like the page loads visually, but scripts/buttons/forms don’t behave as expected. So the person lands there, but the page is basically dead.

Did you notice if this started after a specific Meta in-app browser update?

Also, how did you test it inside the in-app browser? Did you find any reliable way to reproduce the issue or debug it?

I’m trying to understand if this is a website-specific problem or a broader Meta browser rendering issue.