When I go into the Jobs screen it is very hard to get any of the drop down menus to appear. It doesn't matter if I'm trying to click on the Duplicant to assign a job directly, or the job category to see with Duplicants are best suited to the job. I've circled the area I try to click and when I click I hear a sound like I've click on the menu but nothing happens. In order to finally get the menu to show up I just have to keep clicking in exactly the same place over and over and suddenly it will work.
Try to click on the triangle that opens the jobs menu. Happens almost every time. Usually takes about three clicks in the same place for the menu to appear.