That's actually one of the few non-default things on that instance. Because it's a public issue tracker (which few companies outside Atlassian are willing to do to themselves), some comments by employees are hidden to the outside world.
It appears the issue in question was commented on 1 year, 13 weeks ago. But the comment isn't visible to the public, thus the "no comments yet" message.
It appears the issue in question was commented on 1 year, 13 weeks ago. But the comment isn't visible to the public, thus the "no comments yet" message.