I just made a few improvements to Bug Library to address your concern. You previously had to copy the file single-bug-library-bugs.php from the plugin directory to your theme folder to see more details on the single bug page view. It will now be able to use the copy in the plugin directory if there is not one provided in the theme folder.
I also fixed a few issues with undefined variables in that template.
Had you already copied single-bug-library-bugs.php from the plugin folder to your theme folder? If not, please update to the latest version (2.0.1) and try to access a single bug page now and see if you can see the comments.
If the layout of the page looks off, you’ll need to copy single-bug-library-bugs.php from the plugin to your theme directory and modify the structure of the HTML it outputs to match your theme.
Let me know if this helps and please consider donating to support this plugin’s development.