url_info.json endpoint is called twice

The endpoint url_info.json is called twice which seems redundant to me:
1. When step 3 loads
2. After clicking next of step 3


Start by searching the codebase for the url_info.json endpoint and trace the requests made when step 3 loads and when Next is clicked. Reproduce the workflow to confirm both calls, then verify that the endpoint is requested only once while the step flow still works.

Scritto dal modello di indicizzazione a partire dal testo della issue.