Public App got rejected

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  I recently submitted a Shopify Public App but got rejected for the reason,

Correct your use of App Bridge using our documentation. Your OAuth redirect request fails to escape the iframe and doesn't successfully direct to your embedded app's version. However, your app does successfully use App Bridge from the installed apps list. Make your app's embedded user interface experience consistent to comply with our embedded app requirements.

But followed the tutorial, where its truly written that its gonna redirect to the app url after the first installation.

Can anyone please clearify?