Recently I have seen a small UI issue in mouse-over drop-downs. Here is an example of such a drop-down (although Bloomberg is not the only offender):
edit: Adding marked-up screenshot for historical purposes. The red line is the user's mouse path. Entering the red box will instantly hide the Opinion drop-down.
If you hover over "Opinion" in the top bar, you will be presented with links related to the Opinion section.
The issue: A straight-line path from positions within the Opinion button to some of the links will cross through the "Politics" section, instantly clearing the Opinion options. This means the user has to conciously think about their mouse pathing as they select the link.
Is there a name for this issue? What are the best ways to resolve it?