I have only noticed this happening in the last few days, so it may be new with 1.02. As a new turn starts, or even in the middle of a turn, the UI focus will shift to a unit stack somewhere on the map, but show the details in the lower left corner for a different stack. It is really confusing when you move the unit and discover a few turns later that the wrong one moved.  I now have to tab through the units to make sure that the one in the main window is the same as the one in the detail window.