sorry for the late reply.
I will try to explain it by another way:
If we expexct that we have a Parent node (named Department) and Child node (named Thomas Miller).
I search for Thomas Miller. This Node will be marked in yellow. If now i selected the Parent node "Department", the label is not visible or not marked as selected.
In my opinon the problem is a white label on white background.
I hope I have explained it more understandable?
I could even offer to send screenshots?