Steps to Reproduce

1. run the attached example

Current Result

Uncaught TypeError: Cannot read property 'removeElementFromCollection' of undefined
at obj.destroy (chart.wpd:99333)
at obj.remove (chart.wpd:99304)
at obj.generatePoints (chart.wpd:98899)
at obj.translate (chart.wpd:98941)
at chart.wpd:24983
at Array.forEach (<anonymous>)
at H.Chart.renderSeries (chart.wpd:24982)
at H.Chart.<anonymous> (chart.wpd:50133)
at H.Chart.obj.<computed> [as renderSeries] (chart.wpd:1381)
at H.Chart.render (chart.wpd:25091)

Expected Result

marker radius looks bigger

Debug Information

• smiliar like https://www.zkoss.org/zkchartsdemo/network_graph