aescripts + aeplugins

I'm using Plexus 2 in After Affects CC2014. I'm using nulls as my geometry and drawing lines between them, with the lines set to "get opacity from vertices". However, when I keyframe the opacity of one of the nulls, it has absolutely no effect on the opacity of the Plexus lines; everyline maintains uniform opacity. However, when I uncheck "get opacity from vertices," all the lines rise uniformly in opacity. Has anyone else encountered this problem? Thanks so much