Vertical navigation component - sub-navigation items offscreen.

This vertical navigation component set up on the right side of the screen:

In runtime, the subnavs still try to display to the right of the main nav item, and cannot be accessed.

Also, the fateful “bottom of the screen” issue looks to be in play here as well. The nav component should respond to its on-screen location to determine which direction (vertically and horizontally) to display the subnav items).

Yup.  I’ve seen this too… Part of a broader piece of work to make navigation better respond to its surrounding screen.