This is due to inconsistency from Github on the labeling of the issue text. That issue has no comments - the header shows "lostthetrail opened this issue 7 hours ago · 0 comments". The first "comment" you see is meant to be the original issue text, not a comment.

And yet... the header for that text says "lostthetrail commented 7 hours ago". Github repurposed the commenting system to stand in for the issue text itself. Side effect of a lazy implementation.

tldr; The first "comment" isn't a comment. It's the issue itself, and is where you add your reaction for the issue.