I have the "Create on Transition" add in. I am having trouble getting the value of a custom field to transfer on an issue I am creating. I have tried nearly every combination of values for the URL. No matter what I try, the field value does not transfer. I don't have this problem with any of the other fields. What is the correct format I should be using here?

I have tried using just the issue key, just the URL, the key and URL, the summary and URL (In image above) - none are working... 😒