Currently you can find an imported task by their reference, but this only works when using the related field in Maniphest's advanced search. Introducing "fl321" in the general search box in the header doesn't throw any results.
Would it be feasible to have the reference field indexed in the general search, so users could simply introduce i.e. "bz1234" in order to find the corresponding Phabricator task?
And even better, could be still throw a meaningful result if the user simply queries 1234 (since they might not be aware on the bz, rt, fl prefixes)?