This is reproducible in 19.2.0.48 with this code.
@page "/"
@using Syncfusion.Blazor.Charts
<div style="width:629px;height:629px">
<SfChart>
<ChartArea><ChartAreaBorder Width="0"></ChartAreaBorder></ChartArea>
<ChartPrimaryXAxis ValueType="Syncfusion.Blazor.Charts.ValueType.DateTime" IntervalType="IntervalType.Months" EdgeLabelPlacement="EdgeLabelPlacement.Shift">
<ChartAxisMajorGridLines Width="0"></ChartAxisMajorGridLines>
</ChartPrimaryXAxis>
<ChartPrimaryYAxis Interval="20">
<ChartAxisMajorTickLines Width="0"></ChartAxisMajorTickLines>
<ChartAxisLineStyle Width="0"></ChartAxisLineStyle>
</ChartPrimaryYAxis>
<ChartTooltipSettings Enable="true" Format="<b>${point.x} : ${point.y}%</b>"></ChartTooltipSettings>
<ChartSeriesCollection>
<ChartSeries DataSource=@ChartData Name="1 Compliant (verified)" XName="DateInterval" YName="Response1_Value" Fill="#339966" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="2 Compliant" XName="DateInterval" YName="Response2_Value" Fill="#99CC00" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="3 Partially compliant" XName="DateInterval" YName="Response3_Value" Fill="#FF9999" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="4 Non-compliant" XName="DateInterval" YName="Response4_Value" Fill="#FF0000" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="X Status not known" XName="DateInterval" YName="ResponseX_Value" Fill="#FFCC99" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="N Not applicable (verify)" XName="DateInterval" YName="ResponseNAV_Value" Fill="#FF9900" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="N Not applicable" XName="DateInterval" YName="ResponseN_Value" Fill="#CCCCCC" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
<ChartSeries DataSource=@ChartData Name="Not evaluated" XName="DateInterval" YName="ResponseNE_Value" Fill="#999999" Width="2" Opacity="1" Type="ChartSeriesType.StackingArea100" />
</ChartSeriesCollection>
</SfChart>
</div>
@code {
public class ComplianceIntervalData
{
public DateTime DateInterval { get; set; }
public double Response1_Value { get; set; }
public double Response2_Value { get; set; }
public double Response3_Value { get; set; }
public double Response4_Value { get; set; }
public double ResponseN_Value { get; set; }
public double ResponseX_Value { get; set; }
public double ResponseNAV_Value { get; set; }
public double ResponseNE_Value { get; set; }
}
public List<ComplianceIntervalData> ChartData = new List<ComplianceIntervalData>
{
new ComplianceIntervalData { DateInterval = new DateTime(2020, 07, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2020, 08, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2020, 09, 30), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2020, 10, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2020, 11, 30), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2020, 12, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 01, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 02, 28), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 03, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 04, 30), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 05, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 06, 30), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000},
new ComplianceIntervalData { DateInterval = new DateTime(2021, 07, 31), Response1_Value = 2.080000, Response2_Value = 3.700000, Response3_Value = 0.110000, Response4_Value = 1.160000, ResponseN_Value = 0.020000, ResponseX_Value = 0.040000, ResponseNAV_Value = 0.530000, ResponseNE_Value = 92.370000}
};
}