Pattern mapping does not work on project

[poi33]

XP version: 7.12.0

When setting a pattern mapping in site.xml having the app installed on the project does not trigger the controller.
The url used is: localhost:8080/site/my-first-project/draft/api

<site>
    <mappings>
        <mapping controller="/mappings/api.js">
            <pattern>/api</pattern>
        </mapping>
    </mappings>
</site>

Creating a site and installing the app with the same mapping does trigger the controller
The url used is: localhost:8080/site/my-first-project/draft/test2/api