minor fix

src/index.ts

@@ -290,17 +290,12 @@ export class LinePod extends ChartwerkPod<LineTimeSerie, LineOptions> {
     let points = []; // datapoints in each metric that is closest to xValue/yValue position
     this.series.visibleSeries.forEach((serie: LineTimeSerie) => {
       const closestDatapoint = this.getClosestDatapoint(serie, xValue, yValue);
-      if(_.isNil(closestDatapoint)) {
+      if(_.isNil(closestDatapoint) || _.isNil(closestDatapoint[0])) {
         this.hideCrosshairCircle(serie.idx);
-        return;
-      }
-
+      } else {
         const xPosition = this.state.xScale(closestDatapoint[0]);
         const yPosition = this.state.yScale(closestDatapoint[1]);
-      if(!_.isNil(closestDatapoint[0])) {
         this.moveCrosshairCircle(xPosition, yPosition, serie.idx);
-      } else {
-        this.hideCrosshairCircle(serie.idx);
       }
 
       points.push({