Drupal has its own issue queue for working with a team of developers around the world. If you need help for a specific project, core, module, or a theme related, you should go to the issue queue, where the maintainers, users, and followers of the module/theme communicate.
The issue page provides a filter option, where you can search for specific issues based on Project, Assigned, Submitted by, Followers, Status, Priority, Category, and so on.
We can find issues at https://www.drupal.org/project/issues/colorbox. Here, replace colorbox with the specific module name. For more information, see https://www.drupal.org/issue-queue.
In our case, we have one issue with the colorbox module. Captions are working for the Automatic and Content title properties, but are not working for the Alt text and Title text properties. To check this issue, go to Structure | Content types and click on Manage display. On the next screen, click on the settings icon for the Recipe images...