BigdataGraph#addEdge with same SOP but different predicate creates LinkedList of labels, causing ClassCastException on BigdataEdge#getLabel

[macks22]

String graphUrl = "http://localhost:9200/bigdata/sparql";
BigdataGraph graph = new BigdataGraph(graphUrl);
Vertex subject = graph.addVertex("subject");
Vertex object = graph.addVertex("object");
String edgeId = UUID.randomUUID().toString();

String firstLabel = "label1";
Edge firstEdge = graph.addEdge(edgeId, subject, object, firstLabel)

String secondLabel = "label2";
Edge secondEdge = graph.addEdge(edgeId, subject, object, secondLabel);

// throws java.lang.ClassCastException: java.util.LinkedList cannot be cast to java.lang.String
secondEdge.getLabel();