This is a minor UX issue that was pointed out to me today. Most form inputs on Discourse that open a user dropdown menu allow you to start the search by entering an @ symbol and then entering the first few letters of the username. The ‘Posted by’ field on the advanced search menu does not allow for this. If a search is begun with @, it will always return ‘No matches found’:
I’d never noticed this before because I normally just search for the username directly from the main search input:
If possible, it would be good to have consistent behaviour for user auto-complete menues.