WooCommerce Checkout Issue specific to Instagram In-App Browser

I contacted WooCommerce support and they told me to go to Utilities (my hosting is through WPEngine) and disable ‘Redirect Bots’. That instantly fixed the issue for me.

I then contacted my hosting to make sure that was safe for the site and they instead created a rule on their end so that all bots weren’t being allowed to hit the real site rather than a cached version. This is what they said they created if this helps you in any way.

if ($http_user_agent ~* "Instagram") { break; } 

is what I set up on our end for your Nginx config – basically it causes the current rule we have for Instagram to be ignored.

Hopefully, this helps you!