Appears to be related to bug here and cannot be found on current CAR list.
Autoscaling does not cause an update when the Value or Value (Signaling) property is used to update the value, but does when the value is updated via the terminal or local variable.
User reports in this thread that having an array of numbers with unit labels visible and display format to SI will cause pop-up menus to not display properly if a mixture of units occurs (i.e. 1s and 1ms).