There seems to be no completion popup when adding a comment to a particular answer. Steps to reproduce are:
- Navigate to Clicking on tag link on a question does not list other questions with that same tag
- Click on the Add Comment button
- Type "@N" and wait a second or two and see no completion:
- Notice that there is no completion for the "Normal Human" user that had added a previous comment (see image above).
I have seen this work elsewhere in the stackexchange web sites, but try as I might I cannot even reproduce it anymore (tried it in How do I auto-reply to text messages received through Google Voice? using "@u" on the main question comment area and it did not complete the name).
Info on browser used is in a Gist.