message: only call drawGraph once
diff: @@ -418,8 +418,7 @@ function nvd3Vis(slice, payload) {
  // this will clear them before rendering the chart again.
  hideTooltips();
  - const graph = drawGraph();
  - nv.addGraph(graph);
  + nv.addGraph(drawGraph);
  }
  module.exports = nvd3Vis;
  