angularjs - How can I avoid to trigger the applyDrilldown Function in Highcharts -

angularjs - How can I avoid to trigger the applyDrilldown Function in Highcharts -

i have build own drilldown behaviour javascript error in chart.prototype.applydrilldown function when press on text under stacked chart instead of column. how possible avoid behaviour?

here plunkr: http://plnkr.co/edit/dfvn9jnvqu2dv4s7jn7q?p=info

regards

ps.: in real project event triggered series.length times. can not reproduce in plunkr. ideas should look?

angularjs highcharts