Thank you so much for using our theme Gist. And we would like you to thank you for using the support forum for the query.
Well, while checking on the theme Demo, it looks perfectly fine. It means that there is nothing changed on theme code. And you already mentioned that you enabled possible things of hiding comments on your site as well.
Dear Scott, Here is the link of WordPress.Org and it described everything about the comment. Please try once. If not worked, please let us know. We will guide you with alternative menthods.
With Best Regards