Error 425 on using link preview in a loop (Backend Workflow)

I am building a quora-like app where answers contain URLs. Everytime an answer is entered, i am extracting all the urls in the answer as a regex and running a loop on each url to store the title and image of each url. But I am getting this error : -

This is the api workflow i am scheduling when submit button is clicked : -

This is the backend workflow details : -