Can't Nudge Layers in Harmony 15.04

Unable to nudge one layer forward on the z-axis in a child / parent hierarchy.
All other layers nudged fine but one won’t move forward.
Focus on Mouse Enter is enabled in the general preferences.
Have tried hitting alt + down arrow & up arrow.
Have tried to nudge item when mouse is over Camera view so that window is outlined in red.
I’ve also tried it with the Timeline view so that window is outlined in red.
Super frustrated & stuck.

Anybody got any suggestions?

Thanks,
jj

Is your composite set to passthru in the node view?