Highcharts columnrange工具提示问题

Question

Why all item from 1st row have same tooltip, based on 2nd point http://jsfiddle.net/Ye3Ak/243/ ?

    tooltip:{
        formatter: function() {
                return '<b>'+ this.x +' - ' +this.series.name +' - ' +this.point.name +'</b><br/>'+
                    Highcharts.dateFormat('%e %B %H:%M',this.point.low)+
                    ' - ' +Highcharts.dateFormat('%B %e %H:%M',this.point.high)+'<br/>';
            }
    },

Answer 1

It looks like bug, because in 4.0.4 it worked properly. I reported it to our developers here: https://github.com/highslide-software/highcharts.com/issues/3899