Rest API delay to update data

I’m trying to implement a customized board tool using the Github’s Project cards rest api.
But when I call POST https://api.github.com/projects/columns/cards/CARD_ID/moves it returns ok created. But when i fech the project columns card again the change was not made. Sometimes after a few minutes it updates.
Is this expected? Is this a limitation of the api or maybe I’m doing things wrong?