I have 2 SP lists. One is for Employee Profile the other is for tasks. The Task List and Profile list have the employee name column in common and that is how they are linked. The task list has a lookup field that looks up the employee's information and returns email, phone, office, city, hire date etc. This all works great in SP but when we build an app based on the task list 1 or 2 of the lookup fields are placed on detail screen. When I try to add more, they will not add. A blank data card is added.