The control you show looks like a ring control and the label says Ring. You called it a List box.
I see the effect that you report with rings but not with a listbox. It also occurs with enums.
It gets really interesting on a dual monitor computer. The selection list jumps completely to the other monitor when the VI window and the control are close to the boundary between monitors.
I tried various text justification settings but none of those seemed to change anything.
I do not have nay suggestions but can confirm that it happens. LV 2014, 64-bit, Mac OS X 10.9.5.
Lynn