I'm building a rule that will clone issues into specific boards, and I'm using Jira smart values for my custom fields. They all work great, except for URLs. I have tried using the following smart values to no avail:
{{issue.customfield_XXXXX.value}}
{{issue.customfield_XXXXX.url}}
The URL is not displaying at all, not even as text.

The custom field was created as a URL (see below). I also tried changing the custom field to "Short text" but it would still not display URLs (not even as text), and I would rather the custom field be a URL, not short text.

What smart value should I be using for a custom field that is a URL?