Going back when click center on drilldown feature

[MuhammedAlmaz]

I this issue https://github.com/kurkle/chartjs-chart-treemap/issues/81 there is an example about drilldown component. When i check this example https://codepen.io/stockinail/pen/mdLPRmY there is a bug. Look when you click the center of component it going to back but it should go inner the clicked object items.