stacked bar chart rounding issue

[lovasoa]

Description

In some cases, stacked bar charts do not properly draw border radiuses.

Steps to Reproduce

1. Create a stacked bar charts where
   • the x and y values are provided explicitly for each data point
   • not all series have a value for each value of x
   • there is a bar border radius

Minimal repro:

new ApexCharts(chart_div, {
  chart: { type: "bar", stacked: true },
  series: [
    {data: [{x:2, y:1}]},
    {data: [{x:1, y:1}]}
  ],
  plotOptions: {bar: {borderRadius: 5}},
}).render();

Expected Behavior

A bar chart with two bars

• a rounded green bar of size 1 at x=1
• a rounded blue bar of size 1 at x=2

Actual Behavior

The blue bar at x=2 is not rounded.

Screenshots

Reproduction Link

See https://codepen.io/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-/pen/xbwYXxw?editors=0010