IGV: Short name of combined nodes is hidden by background color

When a combining filter such as "C2 Structural" is applied, the short name of the nodes that are combined into their parents (such as the node "55 Proj" that is combined into "54 CallStaticJava" in the attached screenshot) is hidden by the background black color. The short name should be visible, as is the case for nodes combined into shadowed nodes such as "67 CallStaticJava". The background color should be either white or that specified by a coloring filter. The XML graph file is attached for reproducibility.