What breaks most often in an AI-built site?

Four things, in this order: placeholder text going live, email that cannot send, forms that do nothing, and URLs that only work as hash routes.

Placeholders: all three website builders published a footer with a fake address, fake phone number or a literal "[to be updated]" note.

Email: five of six builders cannot send on a free plan. They say so honestly, but the booking confirmation never reaches the customer.

Forms: 10Web and Durable accept input and then do nothing — no success message, no error, no request.

Routing: Bolt put the admin page behind /#/admin, so the /admin address in the brief returns the landing page.

Where this comes from