Tasks from a User Story Detail API

[Joel]

Hi,
it could be a trivial question, but i just want a confirmation. In fact despite the search  i didn't find an user. In Taiga API in the User story detail structure i see a tasks array, but

it is always empty, it could be handy to have the tasks directly from the user story, in a single API call, I am supposing it's a design choice for performance reasons. am i right?

Regards,

Joel