There is a minor display issue in the desktop and mobile web view with the responsiveness is enabled.
When the responsiveness is enabled, usually we didn't see the reputation in the top bar. But if you are accepting an answer, when the +2 reputation added to the achievements icon, the reputation is also displaying in the top bar.
Top bar in default view:
Top bar when accept an answer:
It seems not a feature, may be a bug in the code.
Does the reputation display in the top bar is intentionally or a bug?