I have an intersection observe in my UsseEffect and when isIntersecting is true a have a lot of request and i get this errors Access to XMLHttpRequest at GET(url)net::ERR_FAILED 503 Uncaught (in promise) Error: Network Error how can nake a good intersection?

my sandbox: https://codesandbox.io/s/gifted-varahamihira-cw6p6?file=/src/App.js

PD. my loader is always there inclusive when i dont have more cards to show please somebody explain me