List of Field of Thing

I have a Thing called URL, with two fields: name and link. In a dropdown, I’d like to display the URL names as text rather than as URLs, because I am going to add one more option called “New Link” which is obviously not a URL. So, the list that I pass to the dropdown has to be of type Text. Currently, Bubble allows me to pass the following formula into the dropdown for “choices source”:

Current Product’s URLs’s Name:sorted:plus item “New Link”

This is accepted by Bubble, so it seems like it converts the list of URLs into a list of Text (made up of the ‘name’ field of each URL). However, in practice, this doesn’t work. The dropdown doesn’t display the name field associated with each URL.

Does anyone know why this isn’t working?