LineChart displays incorrect graph

[tdh8316]

The FlSpots are:

[
    FlSpot(1.0, 2.0),
    FlSpot(16.0, 1.0),
    FlSpot(17.0, 1.0),
    FlSpot(18.0, 2.0),
    FlSpot(19.0, 3.0),
]

And the widget appears:

But I expected this:

This is the full code:

LineChartData(
        gridData: FlGridData(show: false),
        titlesData: FlTitlesData(show: false),
        borderData: FlBorderData(show: false),
        maxY: 4,
        minY: 0,
        maxX: 31,
        lineBarsData: <LineChartBarData>[
          LineChartBarData(
            spots: [
    			FlSpot(1.0, 2.0),
    			FlSpot(16.0, 1.0),
   				FlSpot(17.0, 1.0),
    			FlSpot(18.0, 2.0),
    			FlSpot(19.0, 3.0),
            ],
            isCurved: true,
            colors: <Color>[DefaultColorTheme.main],
            barWidth: 4,
            isStrokeCapRound: true,
            dotData: const FlDotData(
              show: false,
            ),
            belowBarData: BarAreaData(show: false),
          ),
        ],
)

[tdh8316]

Hi @imaNNeoFighT, This occurs not only these spots, but also other many spots.
Is this related to the isCurved option?

[imaNNeo]

Hey buddy,
change the curveSmoothness to 0.1.
If it is worked, close the issue.
Thanks!

[tdh8316]

Thanks!