Reproduction case:
1. In a project, add a kanban dashboard based on a tracker
2. In "Manage Semantic", Add a field in "Card Fields"
3. In "Manage Field Usage" Add a new field
4. In Agile Dashboard, open a new Task, then modifiy this Task
5. Add a member in the project
=> the new field doesn't appears. The new member doesn't appears in "assigned to"
Tested in
https://trial1.mytuleap.com/plugins/agiledashboard/?group_id=412&action=showKanban&id=290 and a private Tuleap