The usual problem with this is that the custom field does not have a "searcher" applied to it, so it can't be indexed.
Check Admin -> Issues -> custom fields, find CODIGO DE PRODUCTO on the list and click Edit next to it, you'll be able to see the name, description and searcher for it. Select a searcher for it and then re-index the projects using it, or run a full re-index
For JSM June Challenge #2, share how your non-technical teams like HR, legal, marketing, finance, and beyond started using Jira Service Management! Tell us: Did they ask to start using it or...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events