Ethan, this is a tricky one because it uses the Project's "Resolvables" collections which is actually a one to many relationship: even though, in your case, you're trying to see the (one) Issue from which the Project was created, Workfront is designed to allow a Project to resolve more than just one Issue.
That said, I believe I can offer a solution that will get you what you need. In your Project report, add a new column, change it to text mode, and then paste in the following:
descriptionkey=resolvables listdelimiter= listmethod=nested(resolvables).lists name=Resolved By textmode=true type=iterate valuefield=name valueformat=HTML
I've shown the results in the sample screen shot below.
Regards,
Doug