Patents data has massive number of references to grandparents, basically every patent has links to almost every grandparent patent in database, in order to resolve this problem famDiagram control provides option to hide direct grand parents connectors. So this demo instead of visualizing direct connections to grandparents shows them with custom template and highlights connection going via intermediate parents with highlight path annotation, so if some grandparent is outside of the current view, end user has indication that there are grandparents directly connected to the current cursor item outside of the screen view.
Try to set hideGrandParentsConnectors into false/true in the following options: