Fix label.

src/chart/custom.js

@@ -393,7 +393,6 @@ function makeRenderItem(customSeries, data, ecModel, api) {
 
         var itemStyle = currItemModel.getModel(ITEM_STYLE_EMPHASIS_PATH).getItemStyle();
 
-        if (currLabelValueDim != null) {
         graphicUtil.setTextStyle(itemStyle, currLabelEmphasisModel, null, {
             isRectText: true
         }, true);
@@ -402,10 +401,9 @@ function makeRenderItem(customSeries, data, ecModel, api) {
             ? zrUtil.retrieve3(
                 customSeries.getFormattedLabel(dataIndexInside, 'emphasis'),
                 customSeries.getFormattedLabel(dataIndexInside, 'normal'),
-                    data.get(currLabelValueDim, dataIndexInside)
+                getDefaultLabel(data, dataIndexInside)
             )
             : null;
-        }
 
         extra && zrUtil.extend(itemStyle, extra);
         return itemStyle;