As a result of the enhancement to allow for issue navigator searches by multiple projects, when such a search is performed, JIRA decides to abandon what it thinks the user's current project is (since they've selected multiple). While this is a reasonable approach, I ask you to consider another option. You could just not 'blank out' the current project when this is done. Users are so used to having a 'current project' that I think it would be preferable to leave the current project unchanged unless a new single project has been chosen. While I see the logic in blanking it out from a programmatic standpoint, I don't see the advantage from a usability perspective.