Horizontal stacked barchart with negative values label position is off

The sum of the bar is shown wrong when there are negative values it the stack and last stack value is 0 (which is so it is not shown in bar on the image)

```
datalabels: {
formatter: (value, ctx) => {
const datasets = ctx.chart.data.datasets;
if (datasets.indexOf(ctx.dataset) === datasets.length - 1) {
let sum = 0;
datasets.map((dataset) => {
sum += dataset.data[ctx.dataIndex] as number;
});
return sum.toFixed(2);
} else {
return '';
}
},
anchor: 'end',
align: 'end',
},
```