If you filter a specific region of p-values, the links, which are outside this range, are still in the plot, but invisible because opacity is set to 0. Because the highlight function is still working on the invisible links, it is possible that you highlight the wrong link because the desired link is overlapped with an other invisible link.
If you filter a specific region of p-values, the links, which are outside this range, are still in the plot, but invisible because opacity is set to 0. Because the highlight function is still working on the invisible links, it is possible that you highlight the wrong link because the desired link is overlapped with an other invisible link.