User not displayed correctly in comment section

I just noticed something strange. So you know, I also use WPDiscuz plugin.

A user has posted, but his name is not clickable so I can visit his profile (in spite of being logged in) and his role tag is not displayed either in this particular comment, but it is in all his other comments he’s done previously in the same post. As I inspect my site closer, I notice this in several posts.

I suspect this is because I deactivated your plugin and it only seems to affect the users who have a custom role. I assumed after creating the roles I could deactivate your plugin, but it seems I was wrong?

After I have activated the plugin, however, the user still does not display his role tag.