The icon shown above is the fa-circle-o one used everywhere else for “regular” notification level, and it gets greyed-out. It should be (blue) fa-circle:
A bug report means something is broken, preventing normal/typical use of Discourse.
While an incorrect icon can certainly be confusing, it doesn’t prevent normal use of Discourse. We still want to fix ux issues (as we did here), but we try to keep the bug category to things that truly break something.