Colour Change when modify date slicer

Hi,

I created a custom visual in power BI that allowed to insert different types of chart in one plot. But when I insert the plot on the dashboard, I have some trouble with date slicer. I define a colour for ma data and I save it with:

let view = dataView[0].categorical;
let categories = view.categories[0];
let objects = categories.objects;
let value = view.values;

for (let i = 0, len = Math.max(value.length); i < len; i++) {
	viewModel.dataPoints.push({
		category: <string>value[i].source.displayName,
		colour: objects && objects[i] && DataViewObjects.getFillColor(objects[i], {
			objectName: "colorSelector",
			propertyName: "fill"
		}, null),
		selectionId: this.host.createSelectionIdBuilder()
			.withCategory(categories, i)
			.createSelectionId(),
	});
}

But when I change the date slicer, objects is null or undefined and colour is reset to default.

There is a solution to always save the color in object when slicer is modify.

Thanks for yours help.