score:0

as you rightly noticed - the values are just too small to be displayed. a good solution can be to set minpointlength and use null data vales insted of 0. for example:

  series: [{
    type: 'column',
    minpointlength: 5,
    stacking: 'normal',
    data: [...]
  }]

live demo: http://jsfiddle.net/blacklabel/ly1fkzdh/

api reference: https://api.highcharts.com/highcharts/series.column.minpointlength

score:1

found the reason: the values are just too small to be displayed. unfortunately, a mouse over won't show at least those values.

setting the clip option to false solve partially the problem.

      this.columnchartoptions.plotoptions = {
        column: {
          stacking: 'normal',
          clip: false
        }
      };

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